Purity ~90% (SDS-PAGE). CD38, also known as ADP-ribosyl cyclase/cyclic ADP-ribose hydrolase 1, is a surface molecule which has been attributed the function of a signaling channel leading to cellular activation and proliferation, an ectoenzyme with multiple function as well as an inducer of Ca2+ mobilization from cytoplasmic stores. It also functions as a plasma membrane signaling receptor in leukocytes. On B cells, It acts as a coreceptor and modulates B cell receptor (BCR) signals. Source: Recombinant protein corresponding to aa43-300 from human CD38, fused to His-Tag at C-terminal, expressed in insect cell. Molecular Weight: ~31.2kD (269aa) 28-40KD (SDS-PAGE under reducing conditions.) Endotoxin: ~1EU/1ug (LAL)