FGA（fibrinogen alpha chain），癌症关联基因，基因ID：2243，这个基因编码凝血因子纤维蛋白原的α亚单位，它是血凝块的组成部分。血管损伤后，编码的前蛋白在纤维蛋白原转化为纤维蛋白的过程中被凝血酶蛋白水解。该基因突变可导致多种疾病，包括纤维蛋白原异常、低纤维蛋白原血症、无纤维蛋白原血症和肾淀粉样变性。选择性剪接导致多个转录变体，其中至少一个编码经历蛋白水解处理的亚型。[由RefSeq提供，2016年1月]This gene encodes the alpha subunit of the coagulation factor fibrinogen， which is a component of the blood clot. Following vascular injury， the encoded preproprotein is proteolytically processed by thrombin during the conversion of fibrinogen to fibrin. Mutations in this gene lead to several disorders， including dysfibrinogenemia， hypofibrinogenemia， afibrinogenemia and renal amyloidosis. Alternative splicing results in multiple transcript variants， at least one of which encodes an isoform that undergoes proteolytic processing. [provided by RefSeq， Jan 2016]。