A striped racer, also known as the California whipsnake, is a species of non-venomous snake native to the coast and foothills of California. It is a long, slender, and fast-moving snake, identified by its distinctive stripes running down the length of its body. They primarily feed on lizards and small rodents. The scientific name for this species is Masticophis lateralis.
Protein s deficiency
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Because protein S binds and assists activated protein C in the degradation of coagulation factors Va and VIIIa, deficiency of protein S predisposes to venous thrombosis.
(See also Overview of Thrombotic Disorders.)
Protein S, a vitamin K–dependent protein, is a cofactor for activated protein C–mediated cleavage of factors Va and VIIIa. Protein S and protein C are, therefore, components of a natural plasma anticoagulant system.
Heterozygous deficiency of plasma protein S predisposes to venous thrombosis. Heterozygous protein S deficiency is similar to heterozygous protein C deficiency in genetic transmission, prevalence, laboratory testing, treatment, and precautions.
Homozygous deficiency of protein S can cause neonatal purpura fulminans that is clinically indistinguishable from that caused by homozygous deficiency of protein C.
Acquired deficiencies of protein C (and, soon thereafter, protein S) occur during disseminated intravascular coagulation (DIC) and warfarin therapy.
Diagnosis is based on antigenic assays of total or free plasma protein S (free protein S is the form unbound to the protein S carrier molecule, C4-binding protein).
Protein s deficiency meaning & definition 1 of Protein s deficiency.