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biological source
bovine (calf) thymus
Quality Level
type
Type III-S
form
powder
concentration
≥60% protein (biuret)
technique(s)
activity assay: suitable
solubility
H2O: soluble 10 mg/mL, clear to hazy, colorless to light yellow
storage temp.
2-8°C
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Application
Histone is suitable for use:
- as a positive control in the in vitro kinase assay to examine the ability of Cdc2-cyclin B1 to phosphorylate GST-CD-4 protein
- in Cdk5 activity assay
- in histone H1 kinase assay
- as a Poly(ADP-ribose) (PAR) acceptor in the assessment of in vitro PAR polymerase activity
- as an acceptor of 32P from [γ-32P]ATP in order to measure protein kinase activity of lysate from small and large luteal cells
Biochem/physiol Actions
Histones are a group of proteins characterized by high levels of lysine and arginine that form reversible complexes with DNA. Based on the fractions, the molar mass of histones varies between 11-21kDa. Five different fractions have been isolated and characterized. They include H1 (lysine rich), H2a and H2b that are slightly lysine rich, H3 and H4 that are arginine rich. H1 acts as a link between "beads" (nu bodies) on the chromatin chain.
Features and Benefits
Do not confuse Sigma "Type" designations with the "Fraction" designations used by Luck and co-workers.
Other Notes
Characterized as mainly subgroup f1 by SDS-PAGE
Preparation Note
Lysine-rich fraction as isolated and described by de Nooij, E. and Westenbrink, H.G., Biochim. Biophys. Acta, 62, 608 (1962).
Storage Class Code
11 - Combustible Solids
WGK
WGK 3
Flash Point(F)
Not applicable
Flash Point(C)
Not applicable
Personal Protective Equipment
dust mask type N95 (US), Eyeshields, Gloves
Certificates of Analysis (COA)
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