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Histone H3 Protein, Xenopus laevis (135a.a)

Cat. No.: HY-P72333
COA Handling Instructions

Histone H3 Protein constitutes a core element in the nucleosome, an octamer comprising H2A, H2B, H3, and H4. The assembly forms a histone octamer with one H3-H4 heterotetramer and two H2A-H2B heterodimers, serving as a molecular spool that wraps around 147 base pairs of DNA. This compact organization contributes to chromatin structure, and Histone H3, as part of this assembly, plays a crucial role in chromatin structure and gene regulation. Histone H3 Protein, Xenopus laevis (135a.a) is the recombinant Xenopus laevis-derived Histone H3 protein, expressed by E. coli , with tag free. The total length of Histone H3 Protein, Xenopus laevis (135a.a) is 135 a.a., with molecular weight of ~20 kDa.

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Description

Histone H3 Protein constitutes a core element in the nucleosome, an octamer comprising H2A, H2B, H3, and H4. The assembly forms a histone octamer with one H3-H4 heterotetramer and two H2A-H2B heterodimers, serving as a molecular spool that wraps around 147 base pairs of DNA. This compact organization contributes to chromatin structure, and Histone H3, as part of this assembly, plays a crucial role in chromatin structure and gene regulation. Histone H3 Protein, Xenopus laevis (135a.a) is the recombinant Xenopus laevis-derived Histone H3 protein, expressed by E. coli , with tag free. The total length of Histone H3 Protein, Xenopus laevis (135a.a) is 135 a.a., with molecular weight of ~20 kDa.

Background

The Histone H3 Protein is a fundamental component of the nucleosome, which comprises a histone octamer containing two molecules each of H2A, H2B, H3, and H4. This assembly consists of one H3-H4 heterotetramer and two H2A-H2B heterodimers, collectively forming the octameric core. Functioning as a molecular spool, the histone octamer wraps approximately 147 base pairs of DNA around itself, contributing to the compact organization of chromatin. Histone H3, as part of this assembly, belongs to the histone H3 family, playing a pivotal role in chromatin structure and gene regulation.

Biological Activity

Data is not available.

Species

Xenopus laevis

Source

E. coli

Tag

Tag Free

Accession

Q92133 (A2-A136)

Gene ID

399088  [NCBI]

Molecular Construction
N-term
Histone H3 (A2-A136)
Accession # Q92133
C-term
Synonyms
h3c8.S
AA Sequence

ARTKQTARKSTGGKAPRKQLATKAARKSAPATGGVKKPHRYRPGTVALREIRRYQKSTELLIRKLPFQRLVREIAQDFKTDLRFQSSAVMALQEASEAYLVALFEDTNLCAIHAKRVTIMPKDIQLARRIRGERA

Molecular Weight

Approximately 20 kDa

Purity
  • Greater than 95% as determined by reducing SDS-PAGE.
Appearance

Lyophilized powder.

Formulation

Lyophilized from a 0.2 μm filtered solution of 50 mM Tris-HCL, 300 mM NaCL, 200 mM arginine, pH 8.0.

Endotoxin Level

<1 EU/μg, determined by LAL method.

Reconstitution

It is not recommended to reconstitute to a concentration less than 100 μg/mL in ddH2O. For long term storage it is recommended to add a carrier protein (0.1% BSA, 5% HSA, 10% FBS or 5% Trehalose).

Storage & Stability

Stored at -20°C for 2 years. After reconstitution, it is stable at 4°C for 1 week or -20°C for longer (with carrier protein). It is recommended to freeze aliquots at -20°C or -80°C for extended storage.

Shipping

Room temperature in continental US; may vary elsewhere.

Documentation

Histone H3 Protein, Xenopus laevis (135a.a) Related Classifications

Help & FAQs
  • Do most proteins show cross-species activity?

    Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

  • Reconstitution Calculator

  • Dilution Calculator

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The reconstitution calculator equation

Volume (to add to vial) = Mass (in vial) ÷ Desired Reconstitution Concentration

Volume (to add to vial) = Mass (in vial) ÷ Desired Reconstitution Concentration
= ÷

The dilution calculator equation

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)

This equation is commonly abbreviated as: C1V1 = C2V2

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)
× = ×
C1   V1   C2   V2

The specific activity calculator equation

Specific Activity (Unit/mg) = 106 ÷ Biological Activity (ED50)

Specific Activity (Unit/mg) = 106 ÷ Biological Activity (ED50)
Unit/mg = 106 ÷ ng/mL

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Histone H3 Protein, Xenopus laevis (135a.a)
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