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SorCS1 is a 130 kDa type I transmembrane protein, belonging to Vps10p-domain (Vps10p-D) receptor family that comprises an N-terminal Vps10p-D, a leucine-rich domain, a single transmembrane domain, and a short cytoplasmic domain. SorCS1 is synthesized as a proprotein, which is converted to the mature receptor in late Golgi compartments by cleavage of the N-terminal propeptide. Alternative splicing of human SorCS1 results in four isoforms with different cytoplasmic domains and differential expression in tissues. This antibody was generated against the C-terminal region of human SorCS1 and recognizes various forms of SorCS1. Multiple bands around 100-130 kDa as well as 60-80 kDa have been detected in Y79 cells by western blot assay.