1. Recombinant Proteins
  2. Immune Checkpoint Proteins
  3. Inhibitory Checkpoint Molecules

Inhibitory Checkpoint Molecules

Inhibitory checkpoint molecules play an important role in the maintenance of immune homeostasis: their expression on effector T cells ensures the proper contraction of effector T cell responses; their expression on regulatory T (Treg) cells promotes the suppressive function of Tregs. Blockade of inhibitory immune checkpoint molecules has proven to enhance immune responses to various cancers and exhibit remarkable clinical efficacy in cancer treatment.

Cat. No. Product Name / Synonyms Species Source
  • HY-P73716
    PD-L1 Protein, Mouse (HEK293, His-Fc)

    Programmed cell death 1 ligand 1; PD-L1; B7-H1; CD274; PDL1

    Mouse HEK293
    PD-L1 protein serves as a ligand for the inhibitory receptor PDCD1/PD-1 and is critical for maintaining immune tolerance. This interaction modulates T cell activation, limits effector responses and may stimulate IL10-producing T cell subsets. PD-L1 Protein, Mouse (HEK293, His-Fc) is the recombinant mouse-derived PD-L1 protein, expressed by HEK293 , with C-hFc, C-His labeled tag. The total length of PD-L1 Protein, Mouse (HEK293, His-Fc) is 238 a.a., with molecular weight of 64-90 kDa.
  • HY-P72359
    CD47 Protein, Human (Biotinylated, HEK293, Avi-His)

    Leukocyte Surface Antigen CD47; Antigenic Surface Determinant Protein OA3; IAP; MER6

    Human HEK293
    CD47 is an adhesion protein that regulates integrin signaling through G protein activation and serves as a receptor for thrombospondin THBS1, affecting signal transduction, cardiovascular homeostasis, inflammation, apoptosis, angiogenesis, self-renewal and Immunomodulatory. It regulates pulmonary endothelin EDN1 signaling, acts as a pressor in blood pressure regulation, and is critical for memory formation. CD47 Protein, Human (Biotinylated, HEK293, Avi-His) is the recombinant human-derived CD47 protein, expressed by HEK293 , with C-Avi, C-6*His labeled tag. The total length of CD47 Protein, Human (Biotinylated, HEK293, Avi-His) is 121 a.a., with molecular weight of 30-55 kDa.
  • HY-P70632
    PD-L1 Protein, Mouse (HEK293, His)

    Programmed cell death 1 ligand 1Cd274; programmed cell death 1 ligand 1; PD-L1; PDCD1 ligand 1; programmed death ligand 1; B7 homolog 1; B7-H1; CD274

    Mouse HEK293
    PD-L1 protein serves as a ligand for the inhibitory receptor PDCD1/PD-1 and is critical for maintaining immune tolerance. This interaction modulates T cell activation, limits effector responses and may stimulate IL10-producing T cell subsets. PD-L1 Protein, Mouse (HEK293, His) is the recombinant mouse-derived PD-L1 protein, expressed by HEK293 , with C-6*His labeled tag. The total length of PD-L1 Protein, Mouse (HEK293, His) is 220 a.a., with molecular weight of 38-58 kDa.
  • HY-P7395
    PD-1 Protein, Human (CHO, Fc)

    rHuPD-1, Fc Chimera; PD1; CD279; PDCD1

    Human CHO
    PD-1 Protein, Human (CHO, Fc) suppress activating signals from the T cell receptor when bound by either of its ligands, programmed death-ligand 1 (PD-L1) or PD-L2.
  • HY-P70633
    PD-L1 Protein, Mouse (220a.a, HEK293, Fc)

    Programmed cell death 1 ligand 1Cd274; programmed cell death 1 ligand 1; PD-L1; PDCD1 ligand 1; programmed death ligand 1; B7 homolog 1; B7-H1; CD274;

    Mouse HEK293
    PD-L1 protein serves as a ligand for the inhibitory receptor PDCD1/PD-1 and is critical for maintaining immune tolerance. This interaction modulates T cell activation, limits effector responses and may stimulate IL10-producing T cell subsets. PD-L1 Protein, Mouse (220a.a, HEK293, Fc) is the recombinant mouse-derived PD-L1 protein, expressed by HEK293 , with C-hFc labeled tag. The total length of PD-L1 Protein, Mouse (220a.a, HEK293, Fc) is 220 a.a., with molecular weight of 66-90 kDa.
  • HY-P7396
    PD-1 Protein, Human (143a.a, HEK293, His)

    rHuPD-1, His; PD1; CD279; PDCD1

    Human HEK293
    PD-1 Protein, Human (143a.a, HEK293, His) suppress activating signals from the T cell receptor when bound by either of its ligands, programmed death-ligand 1 (PD-L1) or PD-L2.
  • HY-P7398
    PD-L1 Protein, Human (HEK293, His)

    rHuPD-L1, His; Programmed death ligand 1; CD274; B7-H1

    Human HEK293
    PD-L1 Protein, Human (HEK293, His) play a major role in suppressing the adaptive arm of immune system during particular events such as pregnancy, tissue allografts, autoimmune disease and other disease states such as hepatitis.
  • HY-P70737
    FGL1 Protein, Human (HEK293, His)

    Fibrinogen-like protein 1; FGL1; HP-041; Hepassocin; HFREP-1; LFIRE-1

    Human HEK293
    FGL1 protein, a major ligand for LAG3, suppresses antigen-specific T-cell activation, mediating LAG3's inhibitory function independently of MHC-II binding. Secreted by hepatocytes, FGL1 contributes to their growth. Existing as a homodimer, FGL1 interacts with LAG3 through its Fibrinogen C-terminal domain, specifically binding to LAG3's Ig-like domains 1 and 2. This interaction underscores FGL1's significance in modulating immune responses and hepatocyte growth, positioning it as a key regulator of T-cell activation and hepatic functions. FGL1 Protein, Human (HEK293, His) is the recombinant human-derived FGL1 protein, expressed by HEK293 , with C-6*His labeled tag. The total length of FGL1 Protein, Human (HEK293, His) is 290 a.a., with molecular weight of ~35.0 kDa.
  • HY-P70679
    IDO Protein, Human (His)

    Indole 2; 3-dioxygenase; Indoleamine 2; 3-dioxygenase 1; IDO-1; IDO1; IDO; INDO

    Human E. coli
    IDO proteins catalyze the first step in tryptophan catabolism via the kynurenine pathway, which is critical for immune tolerance and homeostasis maintenance. IDO Protein, Human (His) is the recombinant human-derived IDO protein, expressed by E. coli , with N-6*His labeled tag. The total length of IDO Protein, Human (His) is 403 a.a., with molecular weight of 40-50 kDa.
  • HY-P70807
    PVR/CD155 Protein, Human (HEK293, His)

    Poliovirus Receptor; Nectin-Like Protein 5; NECL-5; CD155; PVR; PVS

    Human HEK293
    PVR/CD155 Protein, Human (HEK293, His) is a recombinant Human PVR expressed in HEK 293 cells with a His tag at the N-terminus. PVR, Human plays a role in cancer cell invasion and migration.
  • HY-P7399
    PD-L2 Protein, Human (HEK293, Fc)

    rHuPD-L2, Fc Chimera; Programmed cell death 1 ligand 2; B7DC; CD273

    Human HEK293
    PD-L2 Protein, Human (HEK293, Fc), a second ligand for PD-1, interacts with PD-1 negatively regulates T cell proliferation, cytokine production and cytotoxic activity.
  • HY-P70010
    CD73/5'-Nucleotidase Protein, Human (521a.a, HEK293, His)

    rHu5'-nucleotidase/CD73, His; 5'-Nucleotidase; 5'-NT; Ecto-5'-Nucleotidase; CD73; NT5E; NT5; NTE

    Human HEK293
    CD73/5'-Nucleotidase Protein hydrolyzes nucleotide monophosphates, favoring AMP as the primary substrate and showing a preference for ribonucleotide monophosphates. It releases inorganic phosphate and the corresponding nucleoside. CD73 also acts on other substrates, including IMP, UMP, GMP, CMP, dAMP, dCMP, dTMP, NAD, and NMN. CD73/5'-Nucleotidase Protein, Human (521a.a, HEK293, His) is the recombinant human-derived CD73/5'-Nucleotidase protein, expressed by HEK293 , with C-6*His labeled tag.
  • HY-P70525
    PD-1 Protein, Human (HEK293, mFc)

    Programmed cell death protein 1; hPD-1; PDCD1; CD279

    Human HEK293
    PD-1 protein is an inhibitory receptor on T cells that maintains immune tolerance by binding to CD274/PDCD1L1 and CD273/PDCD1LG2. It blocks T cell activation by binding to CD3-TCR and recruiting PTPN11/SHP-2 to dephosphorylate key signaling molecules. PD-1 Protein, Human (HEK293, mFc) is the recombinant human-derived PD-1 protein, expressed by HEK293 , with C-mFc labeled tag. The total length of PD-1 Protein, Human (HEK293, mFc) is 147 a.a., with molecular weight of 55-70 kDa.
  • HY-P70651
    B7-1/CD80 Protein, Human (208a.a, HEK293, His)

    CD80; Activation B7-1 antigen; B7; BB1; CD28LG1; CD28LGB7-1 antigen; T-lymphocyte activation antigen CD80

    Human HEK293
    The CD80 protein plays a key role in T lymphocyte activation, promoting proliferation and cytokine production through CD28 binding. In contrast, interaction with CTLA-4 inhibits T cell activation. B7-1/CD80 Protein, Human (208a.a, HEK293, His) is the recombinant human-derived B7-1/CD80 protein, expressed by HEK293 , with C-6*His labeled tag. The total length of B7-1/CD80 Protein, Human (208a.a, HEK293, His) is 208 a.a., with molecular weight of 38-60 kDa.
  • HY-P70652
    CD276/B7-H3 Protein, Human (433a.a, HEK293, His)

    CD276; B7H34Ig-B7-H3; B7-H3; B7 homolog 3; CD276 antigen; CD276 molecule; Costimulatory molecule

    Human HEK293
    CD276/B7-H3 protein can regulate T cell-mediated immune responses and act as a protective factor for tumor cells by inhibiting natural killer-mediated cell lysis. It also functions as a neuroblastoma cell marker, plays a role in acute and chronic transplant rejection, and modulates lymphocyte activity at mucosal surfaces. CD276/B7-H3 Protein, Human (433a.a, HEK293, His) is the recombinant human-derived CD276/B7-H3 protein, expressed by HEK293 , with C-6*His labeled tag. The total length of CD276/B7-H3 Protein, Human (433a.a, HEK293, His) is 433 a.a., with molecular weight of 65-90 kDa.
  • HY-P70657
    PD-L1 Protein, Human (HEK293, mFc)

    Programmed Cell Death 1 Ligand 1; PD-L1; PDCD1 Ligand 1; Programmed Death Ligand 1; B7 Homolog 1; B7-H1; CD274; B7H1; PDCD1L1; PDCD1LG1; PDL1

    Human HEK293
    The PD-L1 protein critically regulates immune tolerance by acting as a ligand for PDCD1/PD-1, regulating T cell activation threshold, and limiting effector responses. It may act as a costimulatory molecule for IL10-producing T cell subsets. PD-L1 Protein, Human (HEK293, mFc) is the recombinant human-derived PD-L1 protein, expressed by HEK293 , with C-mFc labeled tag. The total length of PD-L1 Protein, Human (HEK293, mFc) is 221 a.a., with molecular weight of 59-89 kDa.
  • HY-P70684
    CTLA-4 Protein, Human (126a.a, HEK293, His)

    Cytotoxic T-lymphocyte protein 4; Cytotoxic T-lymphocyte-associated antigen 4; CTLA-4; CD152; CTLA4

    Human HEK293
    The CTLA-4 protein is a key inhibitory receptor and a major negative regulator of T cell responses in coordination of immune regulation. Its unique property is its significantly increased affinity for B7 ligands (CD80/CD86) compared with CD28. CTLA-4 Protein, Human (126a.a, HEK293, His) is the recombinant human-derived CTLA-4 protein, expressed by HEK293 , with C-6*His labeled tag. The total length of CTLA-4 Protein, Human (126a.a, HEK293, His) is 126 a.a., with molecular weight of 20-25 kDa.
  • HY-P70691
    CTLA-4 Protein, Human (HEK293, GST)

    Cytotoxic T-lymphocyte protein 4, Cytotoxic T-lymphocyte-associated antigen 4, CTLA-4, CD152, CTLA4

    Human HEK293
    CTLA-4 Protein, Human (HEK293, GST) is negative regulator of T-cell immune function.
  • HY-P70706
    CTLA-4 Protein, Mouse (125a.a, HEK293, Fc)

    Cytotoxic T-lymphocyte protein 4; Cytotoxic T-lymphocyte-associated antigen 4; CTLA-4; CD152; Ctla4

    Mouse HEK293
    CTLA-4 is a key inhibitory receptor that serves as a major negative regulator of T cell responses in immune regulation. Its unique property is that its affinity to B7 ligands (CD80/CD86) is significantly higher than that of CD28. CTLA-4 Protein, Mouse (125a.a, HEK293, Fc) is the recombinant mouse-derived CTLA-4 protein, expressed by HEK293 , with C-hFc labeled tag. The total length of CTLA-4 Protein, Mouse (125a.a, HEK293, Fc) is 125 a.a., with molecular weight of 50-60 kDa.
  • HY-P70723
    LAG-3 Protein, Human (HEK293, Fc)

    Lymphocyte activation gene 3 protein; LAG3; LAG-3; Protein FDC; CD223

    Human HEK293
    LAG-3 (lymphocyte activating gene 3) protein is an inhibitory receptor on antigen-activated T cells and is critical for immune regulation. LAG-3 binds to FGL1 and transmits inhibitory signals that negatively affect CD8(+) and CD4(+) T cell proliferation, activation, and effector functions. LAG-3 Protein, Human (HEK293, Fc) is the recombinant human-derived LAG-3 protein, expressed by HEK293 , with C-hFc labeled tag. The total length of LAG-3 Protein, Human (HEK293, Fc) is 428 a.a., with molecular weight of 70-90 kDa.
Cat. No. Product Name Effect Purity