Histones are soluble in water at a concentration of 10 mg/ml or in 0.5 N HCl at the same concentration, yielding a clear or hazy solution depending on the fraction. Histones dissolved or suspended in water should remain stable for at least 6 months when frozen in single-use aliquots.
H5505
Histone from calf thymus
Type III-S
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| Size/SKU | Availability | Price |
|---|---|---|
25 mg | Available to ship TODAYfromMILWAUKEE | $81.30 |
100 mg | Available to ship TODAYfromMILWAUKEE | $183.00 |
250 mg | Available to ship TODAYfromMILWAUKEE | $368.00 |
About This Item
CAS Number:
UNSPSC Code:
41106305
NACRES:
NA.51
Beilstein/REAXYS Number:
1895465
MDL number:
Form:
powder
Biological source:
bovine (calf) thymus
biological source
bovine (calf) thymus
Quality Segment
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
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.
Preparation Note
Lysine-rich fraction as isolated and described by de Nooij, E. and Westenbrink, H.G., Biochim. Biophys. Acta, 62, 608 (1962).
Other Notes
Characterized as mainly subgroup f1 by SDS-PAGE
1 of 1
This Item | |||
|---|---|---|---|
| description Type III-S | description Type VIII-S | description Type II-A, lyophilized powder | description Type XV, Activated, lyophilized powder |
| biological source bovine (calf) thymus | biological source bovine (calf) thymus | biological source bovine (calf) thymus | biological source bovine pancreas |
| technique(s) activity assay: suitable | technique(s) - | technique(s) - | technique(s) - |
| concentration ≥60% protein (biuret) | concentration - | concentration - | concentration - |
| form powder | form powder | form lyophilized powder | form lyophilized powder |
| solubility H2O: soluble 10 mg/mL, clear to hazy, colorless to light yellow | solubility - | solubility - | solubility water: slightly soluble |
| storage temp. 2-8°C | storage temp. 2-8°C | storage temp. 2-8°C | storage temp. −20°C |
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Storage Class
11 - Combustible Solids
WGK
WGK 3
Flash Point (°F)
Not applicable
Flash Point (°C)
Not applicable
PPE (personal protective equipment)
Eyeshields, Gloves, type N95 (US)
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What type of buffer or solution would be best for stabilizing histone proteins? Would ultrapure water (ddH₂O) be suitable for dissolution?
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