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PB2

" in MedChemExpress (MCE) Product Catalog:

By Targets:	Biochemical Assay Reagents (4) DNA/RNA Synthesis (2) Endogenous Metabolite (3) Fluorescent Dye (3) HIV (1) Influenza Virus (14) JAK (1) Reference Standards (3) SARS-CoV (1) Toll-like Receptor (TLR) (1) Virus Protease (1)
By Research Areas:	Cancer (2) Cardiovascular Disease (1) Infection (15) Inflammation/Immunology (1) Metabolic Disease (1) Neurological Disease (3)

Inhibitors & Agonists

Fluorescent Dye

Biochemical Assay Reagents

Natural
Products

Cat. No.	Product Name	Target	Research Areas	Chemical Structure

HY-145586

Onradivir ZSP1273	Influenza Virus DNA/RNA Synthesis	Infection
Onradivir (ZSP1273) is an orally active antiviral agent targeting influenza A virus RNA polymerase PB2 subunit with an IC₅₀ of 0.562 nM. Onradivir inhibits cap binding to influenza A virus RNA polymerase *PB2* subunit, suppresses viral replication, reduces viral titres and RNA loads, and inhibits influenza A virus infection. Onradivir maintains high survival rates in influenza A virus-infected mice, and reduces influenza A virus titers in a murine model. Onradivir can be used for the research of influenza A virus infection ^[2].

HY-12353A

Pimodivir 5+ Cited Publications VX-787	Influenza Virus	Infection
Pimodivir (VX-787) is an orally bioavailable inhibitor of influenza A virus polymerases through interaction with the viral *PB2* subunit.

HY-138649

*PB2*	Influenza Virus	Neurological Disease
PB2 is a tris(2-carboxyethyl)phosphine (TCEP) analogue increasing retinal ganglion (RGCs) cells survival after axotomy in vitro at nanomolar and picomolar concentrations. PB2 is substantially more permeable than TCEP. PB2, as a reducing agent, is highly neuroprotective for RGCs .

HY-W011060

Cryptand 2.2.2 4,7,13,16,21,24-Hexaoxa-1,10-diazabicyclo[8.8.8]hexacosane	Biochemical Assay Reagents	Others
Cryptand 2.2.2 (4,7,13,16,21,24-Hexaoxa-1,10-diazabicyclo[8.8.8]hexacosane) is a metal ion chelator. Cryptand 2.2.2 forms stable mononuclear, protonated and dinuclear complexes with copper (II) ions; forms protonated complexes with hydrogen ions; and also forms stable complexes with Zn ²⁺, Co ²⁺, Ni ²⁺, Cd ²⁺, Hg ²⁺ and Pb ²⁺ ions. Cryptand 2.2.2 can be used for the preparation of nanoparticles, transition metal compounds, etc.

HY-W012683

Iminodiacetic acid	Biochemical Assay Reagents	Cancer
Iminodiacetic acid is a metal ion chelator targeting Cr ⁶⁺, Cd ²⁺, Ni ²⁺, and Pb ²⁺. Iminodiacetic acid selectively and irreversibly binds metal ions through the coordination of carboxyl and imino groups, reduces the toxicity of metal ions and promotes their adsorption and separation. Iminodiacetic acid has the functions of heavy metal ion removal and coordination complex stabilization. Iminodiacetic acid is often used in environmental pollution control (such as heavy metal adsorption in water) and coordination chemistry (such as metal ion detection and separation) research ^[2] .

HY-W015815

6-Methylnicotinamide	Endogenous Metabolite	Neurological Disease
6-Methylnicotinamide is a nicotinamide derivative. 6-methylnicotinamide is also an endogenous metabolite and its sudden increase in the acute stages of intracerebral hemorrhage (ICH) exacerbates neurological damages in rat model. 6-Methylnicotinamide can significantly enhance the coordination effect between acylamino and undercoordinated defective Pb ²⁺ cations. 6-Methylnicotinamide results in enhanced efficiency of perovskite solar cells to 24.33% with excellent environmental storage, heat, and light stabilities ^[2].

HY-N12110

SMU-CX1	Toll-like Receptor (TLR) SARS-CoV	Infection
SMU-CX1 is a specific TLR3 inhibitor (IC₅₀: 0.11 μM) with IC₅₀ ranging from 0.14-0.33 μM against multiple influenza A virus subtypes. SMU-CX1 inhibits the viral PB2 and NP proteins with an IC₅₀ of 0.43 μM for SARS-CoV-2 activity. SMU-CX1 also inhibits inflammatory factors in host cells, including IFN-β, IP-10, and CCL-5 .

HY-W015815R

6-Methylnicotinamide (Standard)	Reference Standards Endogenous Metabolite	Neurological Disease
6-Methylnicotinamide is a nicotinamide derivative. 6-methylnicotinamide is also an endogenous metabolite and its sudden increase in the acute stages of intracerebral hemorrhage (ICH) exacerbates neurological damages in rat model. 6-Methylnicotinamide can significantly enhance the coordination effect between acylamino and undercoordinated defective Pb2+ cations. 6-Methylnicotinamide results in enhanced efficiency of perovskite solar cells to 24.33% with excellent environmental storage, heat, and light stabilities ^[2].

HY-145586A

Onradivir monohydrate ZSP1273 monohydrate	Influenza Virus DNA/RNA Synthesis	Infection
Onradivir (ZSP1273) monohydrate is an orally active antiviral agent targeting influenza A virus RNA polymerase PB2 subunit with an IC₅₀ of 0.562 nM. Onradivir monohydrate inhibits cap binding to influenza A virus RNA polymerase *PB2* subunit, suppresses viral replication, reduces viral titres and RNA loads, and inhibits influenza A virus infection. Onradivir monohydrate maintains high survival rates in influenza A virus-infected mice, and reduces influenza A virus titers in a murine model. Onradivir monohydrate can be used for the research of influenza A virus infection ^[2].

HY-149263

HAA-09	Influenza Virus Virus Protease	Infection
HAA-09 is an orally active and potent anti-influenza agent, targeting the influenza PB2_cap binding domain. HAA-09 displays potent anti-influenza A virus activity, with an EC₅₀ of 0.03 μM. HAA-09 shows polymerase inhibition, with an IC₅₀ of 0.06±0.004 μM. HAA-09 blocks virus replication without causing obvious cytotoxicity .

HY-N7647

Methyl brevifolincarboxylate Brevifolincarboxylic acid methyl ester	Influenza Virus	Infection Cardiovascular Disease Inflammation/Immunology
Methyl brevifolincarboxylate (Brevifolincarboxylic acid methyl ester) is a potent *influenza virus PB2* cap-binding** inhibitor. Methyl brevifolincarboxylate has anti-oxidant activity. Methyl brevifolincarboxylate also inhibits platelet aggregation, lipid metabolism and inflammation ^[2] .

HY-163617

*c-PB2(OH)2*	HIV	Infection
c-PB2(OH)2 is a 4-carboxyphenyl / 4-hydroxyphenyl meso-substituted porphyrin compound. c-PB2(OH)2 shows anti HIV-1 activity under non-photodynamic and photodynamic conditions .

HY-156440

7-51A	Influenza Virus	Infection
7-51A is a potent *PB2* inhibitor with a KD value of 1.64 nM as determined by ITC. PB2 is an essential subunit of influenza RNA-dependent RNA polymerase (RdRP).

HY-100858

PP7	Influenza Virus	Infection
PP7 is a potent PB1-PB2 interaction inhibitor with an IC₅₀ of 8.6 μM, and their inhibition against viral polymerase activity (IC₅₀=9.5 μM). PP7 shows antiviral activities against influenza A virus (IAV), including A(H1N1)pdm09 (EC₅₀=1.4 μM), A(H7N9) and A(H9N2) subtypes .

HY-W012683R

Iminodiacetic acid (Standard)	Biochemical Assay Reagents Reference Standards	Cancer
Iminodiacetic acid is a metal ion chelator targeting Cr6+, Cd2+, Ni2+, and Pb2+. Iminodiacetic acid selectively and irreversibly binds metal ions through the coordination of carboxyl and imino groups, reduces the toxicity of metal ions and promotes their adsorption and separation. Iminodiacetic acid has the functions of heavy metal ion removal and coordination complex stabilization. Iminodiacetic acid is often used in environmental pollution control (such as heavy metal adsorption in water) and coordination chemistry (such as metal ion detection and separation) research ^[2] .

HY-181915

PB2-IN-3	Influenza Virus	Infection
PB2-IN-3 (Compound 11) is a *PB2* inhibitor. PB2-IN-3 exhibits antiviral activity against Influenza A H1N1 and *H3N2* strains. PB2-IN-3 can be used in studies related to influenza A virus infection .

HY-W1113135

Carboxymethyl-β-cyclodextrin sodium salt	Biochemical Assay Reagents	Others
Carboxymethyl-β-cyclodextrin sodium salt is a negatively charged β-cyclodextrin derivative, as well as a metal ion chelator and solubilizing reagent. Carboxymethyl-β-cyclodextrin sodium salt forms stable aqueous complexes with Ba ²⁺, Ca ²⁺, Cd ²⁺, Ni ²⁺, Pb ²⁺, Sr ²⁺, and Zn ²⁺ ions. Carboxymethyl-β-cyclodextrin sodium salt derived hydrogel carriers support oral insulin delivery via paracellular permeation across Caco-2 monolayers and produce sustained hypoglycemic effects in diabetic mice. Carboxymethyl-β-cyclodextrin sodium salt can be conjugated onto folate-modified BSA nanoparticles to boost folate receptor-mediated endocytosis, elevate intracellular anticancer drug uptake and trigger cell apoptosis. Carboxymethyl-β-cyclodextrin sodium salt can be utilized for chiral separation in capillary electrophoresis, development of nanoscale drug carriers and nucleic acid transfection research ^[2] .

HY-180525

PB2-IN-2	Influenza Virus	Infection
PB2-IN-2 is an orally active *PB2* inhibitor with RNA-dependent RNA Polymerase (RNP) IC₅₀ = 0.2 nM, LRA (Ligand Receptor Assay) EC₅₀ = 0.8 nM, Cytopathic Effect (CPE) EC₅₀ = 0.1 nM. PB2-IN-2 exhibits broad-spectrum, nanomolar antiviral potency against a panel of influenza A strains (including H1N1pdm09, Lyon/1337/2007/H1N1, Tex12-Like/H3N2, PR/8/34/H1N1, WSN/1933/H1N1, rPR8(H1N1)/H7N9 with EC₅₀ = 1.5, 3.6, 3.7, 13.8, 2.9 and 9.8 nM and all the CC₅₀ values > 2 μM. PB2-IN-2 possesses an excellent pharmacokinetic profile and metabolic stability. PB2-IN-2 can be used for anti-influenza research .

HY-175559

TTHP 512	Influenza Virus	Infection
TTHP 512 is an influenza A virus (IAV) inhibitor. TTHP 512 demonstrates significant antiviral activity with an IC₅₀ value of 1.46 μM. TTHP 512 inhibits the expression of viral nucleoprotein (NP) and PB2 protein, thereby disrupting the viral replication process. TTHP 512 is promising for research of influenza A virus .

HY-12353B

Pimodivir hydrochlorid hemihydrate VX-787 hydrochlorid hemihydrate	Influenza Virus	Infection
Pimodivir hydrochlorid hemihydrate (VX-787) is an orally bioavailable inhibitor of influenza A virus polymerases through interaction with the viral *PB2* subunit.

HY-129623R

Ethyl nonanoate (Standard)	Reference Standards Endogenous Metabolite	Metabolic Disease
Nigericin (sodium salt) (Standard) is the analytical standard of Nigericin (sodium salt). This product is intended for research and analytical applications. Nigericin sodium salt is an antibiotic from Streptomyces hygroscopicus that works by acting as an H+, K+, and Pb2+ ionophore, a NLRP3 activator .

HY-136894

Rhod-5N	Fluorescent Dye	Others
Rhod-5N is a cell-impermeant calcium-binding fluorescent dye composed of a BAPTA chelating group and a rhodamine fluorophore. Rhod-5N is often added to MOPS buffer to complex and indicate cation content. The selectivity of Rhod-5N for Cd ²⁺ is higher than other interfering cations ((Na+, K+, Mg ²⁺, Ca ²⁺, Zn ²⁺) except Pb ²⁺), and the detection limit is 3.1 μg/L ^[2].

HY-181691

JAK2-IN-20	JAK Influenza Virus	Infection
JAK2-IN-20 is an orally active dual inhibitor targeting *JAK2* kinase (IC₅₀=49.17 nM) and influenza A virus *PB2* protein (IC₅₀=3.337 μM, *K_d*=2.82 μM). JAK2-IN-20 effectively blocks the JAK/STAT signaling pathway by reducing the phosphorylation levels of STAT1 and STAT3, thereby inhibiting viral replication and downregulating the expression of viral NP and *PB2* proteins. In addition, JAK2-IN-20 significantly inhibits the mRNA expression of key inflammatory cytokines such as IL-6, TNF-α and IFN-β in inflammation and influenza infection models. JAK2-IN-20 serves as an important tool molecule for the study of influenza A virus infection and related pathologies .

HY-180162

Influenza A virus-IN-17	Influenza Virus	Infection
Influenza A virus-IN-17 (Compound 6a) is a potent influenza A inhibitor with EC₉₀s of 3.5 μM and 2.6 μM for H3N2 and H1N1, respectively. Influenza A virus-IN-17 inhibits U2-PB2 chimeric mRNA (EC₉₀ = 2.1 μM from cap snatching polymerase) .

HY-D1551

10-(4-(Bis(2-hydroxyethyl)amino)phenyl)-5,5-difluoro-1,3,7,9-tetramethyl-5H-dipyrrolo[1,2-c:2',1'-f][1,3,2]diazaborinin-4-ium-5-uide	Fluorescent Dye	Others
10-(4-(Bis(2-hydroxyethyl)amino)phenyl)-5,5-difluoro-1,3,7,9-tetramethyl-5H-dipyrrolo[1,2-c:2',1'-f][1,3,2]diazaborinin-4-ium-5-uide, a BODIPY derivative, is a fluorescent indicator for detecting *Pb ²⁺* (Ex=504 nM, Em=510 nM) ^[2].

HY-D3009

LCE1	Fluorescent Dye	Others
LCE1 is an azacrown ether-based NIR fluorescence probe. LCT can be used for the detection of Pb ²⁺ in food, environmental water, plant and animal samples .

Cat. No.	Product Name	Type

HY-136894

Rhod-5N	Fluorescent Dye
Rhod-5N is a cell-impermeant calcium-binding fluorescent dye composed of a BAPTA chelating group and a rhodamine fluorophore. Rhod-5N is often added to MOPS buffer to complex and indicate cation content. The selectivity of Rhod-5N for Cd ²⁺ is higher than other interfering cations ((Na+, K+, Mg ²⁺, Ca ²⁺, Zn ²⁺) except Pb ²⁺), and the detection limit is 3.1 μg/L ^[2].

HY-D3009

LCE1	Fluorescent Dye
LCE1 is an azacrown ether-based NIR fluorescence probe. LCT can be used for the detection of Pb ²⁺ in food, environmental water, plant and animal samples .

Cat. No.	Product Name	Type

HY-W011060

Cryptand 2.2.2 4,7,13,16,21,24-Hexaoxa-1,10-diazabicyclo[8.8.8]hexacosane	Biochemical Assay Reagents
Cryptand 2.2.2 (4,7,13,16,21,24-Hexaoxa-1,10-diazabicyclo[8.8.8]hexacosane) is a metal ion chelator. Cryptand 2.2.2 forms stable mononuclear, protonated and dinuclear complexes with copper (II) ions; forms protonated complexes with hydrogen ions; and also forms stable complexes with Zn ²⁺, Co ²⁺, Ni ²⁺, Cd ²⁺, Hg ²⁺ and Pb ²⁺ ions. Cryptand 2.2.2 can be used for the preparation of nanoparticles, transition metal compounds, etc.

Cryptand 2.2.2

4,7,13,16,21,24-Hexaoxa-1,10-diazabicyclo[8.8.8]hexacosane

Biochemical Assay Reagents

Cryptand 2.2.2 (4,7,13,16,21,24-Hexaoxa-1,10-diazabicyclo[8.8.8]hexacosane) is a metal ion chelator. Cryptand 2.2.2 forms stable mononuclear, protonated and dinuclear complexes with copper (II) ions; forms protonated complexes with hydrogen ions; and also forms stable complexes with Zn ²⁺, Co ²⁺, Ni ²⁺, Cd ²⁺, Hg ²⁺ and Pb ²⁺ ions. Cryptand 2.2.2 can be used for the preparation of nanoparticles, transition metal compounds, etc.

Iminodiacetic acid	Alkaloids Classification of Application Fields Other Alkaloids Endogenous metabolite Disease Research Fields Source Classification Cancer	Biochemical Assay Reagents
Iminodiacetic acid is a metal ion chelator targeting Cr ⁶⁺, Cd ²⁺, Ni ²⁺, and Pb ²⁺. Iminodiacetic acid selectively and irreversibly binds metal ions through the coordination of carboxyl and imino groups, reduces the toxicity of metal ions and promotes their adsorption and separation. Iminodiacetic acid has the functions of heavy metal ion removal and coordination complex stabilization. Iminodiacetic acid is often used in environmental pollution control (such as heavy metal adsorption in water) and coordination chemistry (such as metal ion detection and separation) research ^[2] .

6-Methylnicotinamide	Alkaloids Neurological Disease Classification of Application Fields Pyridine Alkaloids Endogenous metabolite Disease Research Fields Source Classification	Endogenous Metabolite
6-Methylnicotinamide is a nicotinamide derivative. 6-methylnicotinamide is also an endogenous metabolite and its sudden increase in the acute stages of intracerebral hemorrhage (ICH) exacerbates neurological damages in rat model. 6-Methylnicotinamide can significantly enhance the coordination effect between acylamino and undercoordinated defective Pb ²⁺ cations. 6-Methylnicotinamide results in enhanced efficiency of perovskite solar cells to 24.33% with excellent environmental storage, heat, and light stabilities ^[2].

SMU-CX1	Apocynaceae Alkaloids Other Alkaloids Plants Source Classification	Toll-like Receptor (TLR) SARS-CoV
SMU-CX1 is a specific TLR3 inhibitor (IC₅₀: 0.11 μM) with IC₅₀ ranging from 0.14-0.33 μM against multiple influenza A virus subtypes. SMU-CX1 inhibits the viral PB2 and NP proteins with an IC₅₀ of 0.43 μM for SARS-CoV-2 activity. SMU-CX1 also inhibits inflammatory factors in host cells, including IFN-β, IP-10, and CCL-5 .

6-Methylnicotinamide (Standard)	Alkaloids Pyridine Alkaloids Endogenous metabolite Source Classification	Reference Standards Endogenous Metabolite
6-Methylnicotinamide is a nicotinamide derivative. 6-methylnicotinamide is also an endogenous metabolite and its sudden increase in the acute stages of intracerebral hemorrhage (ICH) exacerbates neurological damages in rat model. 6-Methylnicotinamide can significantly enhance the coordination effect between acylamino and undercoordinated defective Pb2+ cations. 6-Methylnicotinamide results in enhanced efficiency of perovskite solar cells to 24.33% with excellent environmental storage, heat, and light stabilities ^[2].

Methyl brevifolincarboxylate Brevifolincarboxylic acid methyl ester	Infection Natural Products Classification of Application Fields Canarium album (Lour.) Rauesch. Plants Burseraceae Disease Research Fields Source Classification	Influenza Virus
Methyl brevifolincarboxylate (Brevifolincarboxylic acid methyl ester) is a potent *influenza virus PB2* cap-binding** inhibitor. Methyl brevifolincarboxylate has anti-oxidant activity. Methyl brevifolincarboxylate also inhibits platelet aggregation, lipid metabolism and inflammation ^[2] .

Iminodiacetic acid (Standard)	Alkaloids Other Alkaloids Endogenous metabolite Source Classification	Biochemical Assay Reagents Reference Standards
Iminodiacetic acid is a metal ion chelator targeting Cr6+, Cd2+, Ni2+, and Pb2+. Iminodiacetic acid selectively and irreversibly binds metal ions through the coordination of carboxyl and imino groups, reduces the toxicity of metal ions and promotes their adsorption and separation. Iminodiacetic acid has the functions of heavy metal ion removal and coordination complex stabilization. Iminodiacetic acid is often used in environmental pollution control (such as heavy metal adsorption in water) and coordination chemistry (such as metal ion detection and separation) research ^[2] .

Ethyl nonanoate (Standard)	Structural Classification Natural Products Microorganisms other families Plants Endogenous metabolite Source Classification	Reference Standards Endogenous Metabolite
Nigericin (sodium salt) (Standard) is the analytical standard of Nigericin (sodium salt). This product is intended for research and analytical applications. Nigericin sodium salt is an antibiotic from Streptomyces hygroscopicus that works by acting as an H+, K+, and Pb2+ ionophore, a NLRP3 activator .

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PB2

Inhibitors & Agonists

Fluorescent Dye

Biochemical Assay Reagents

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