Rockville, MD/Seattle, WA ?May 11, 2010 ?OriGene and the Institute for Systems Biology (ISB), announce plans to create a proteotypic PeptideAtlas and develop an SRM/MRM mass spectrometry standard database for 5,000 human proteins (Press Release)
> 80% as determined by SDS-PAGE and Coomassie blue staining
Concentration:
> 50 ug/ml as determined by BCA
Labeling Method:
Labeled with [U- 13C6, 15N4]-L-Arginine and [U- 13C6, 15N2]-L-Lysine
Labeling Efficiency:
> 90% incorporation
Buffer and Storage:
100 mM glycine, 25 mM Tris-HCl, pH 7.3. Store at -80C. Avoid repeated freeze-thaw cycles. Stable for 3 months from receipt of products under proper storage and handling conditions.
*: DDK-tag is the same as FLAG tag. Flag® is a registered trademark of Sigma-Aldrich
Summary: This gene encodes the coagulation factor XIII A subunit. Coagulation factor XIII is the last zymogen to become activated in the blood coagulation cascade. Plasma factor XIII is a heterotetramer composed of 2 A subunits and 2 B subunits. The A subunits have catalytic function, and the B subunits do not have enzymatic activity and may serve as plasma carrier molecules. Platelet factor XIII is comprised only of 2 A subunits, which are identical to those of plasma origin. Upon cleavage of the activation peptide by thrombin and in the presence of calcium ion, the plasma factor XIII dissociates its B subunits and yields the same active enzyme, factor XIIIa, as platelet factor XIII. This enzyme acts as a transglutaminase to catalyze the formation of gamma-glutamyl-epsilon-lysine crosslinking between fibrin molecules, thus stabilizing the fibrin clot. It also crosslinks alpha-2-plasmin inhibitor, or fibronectin, to the alpha chains of fibrin. Factor XIII deficiency is classified into two categories: type I deficiency, characterized by the lack of both the A and B subunits; and type II deficiency, characterized by the lack of the A subunit alone. These defects can result in a lifelong bleeding tendency, defective wound healing, and habitual abortion. [provided by RefSeq, Jul 2008].
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