CD38 protein is pivotal in synthesizing crucial second messengers, cyclic ADP-ribose (cADPR) and nicotinate-adenine dinucleotide phosphate (NAADP) . cADPR participates in glucose-induced insulin secretion, and NAADP functions as a calcium mobilizer. CD38 also displays cADPR hydrolase activity, showcasing its multifunctionality. CD38 Protein, Mouse (HEK293, His) is the recombinant mouse-derived CD38 protein, expressed by HEK293 , with C-6*His labeled tag.