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Most malignant cells showed moderate cytoplasmic positivity occasionally combined with nuclear or membranous positivity. Thyroid cancers and most testicular cancers displayed moderate to strong staining.
This gene encodes coagulation factor VIII, which participates in the intrinsic pathway of blood coagulation; factor VIII is a cofactor for factor IXa which, in the presence of Ca+2 and phospholipids, converts factor X to the activated form Xa. This gene produces two alternatively spliced transcripts. Transcript variant 1 encodes a large glycoprotein, isoform a, which circulates in plasma and associates with von Willebrand factor in a noncovalent complex. This protein undergoes multiple cleavage events. Transcript variant 2 encodes a putative small protein, isoform b, which consists primarily of the phospholipid binding domain of factor VIIIc. This binding domain is essential for coagulant activity. Defects in this gene results in hemophilia A, a common recessive X-linked coagulation disorder. [provided by RefSeq, Jul 2008]
P00451 [Direct mapping] Coagulation factor VIII Factor VIIIa heavy chain, 200 kDa isoform Factor VIIIa heavy chain, 92 kDa isoform Factor VIII B chain Factor VIIIa light chain
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Predicted intracellular proteins Plasma proteins Candidate cardiovascular disease genes Disease related genes FDA approved drug targets Biotech drugs Protein evidence (Ezkurdia et al 2014)