Anti-CD38 antibodies are essential reagents in flow cytometry for detecting the target protein, CD38 molecule. CD38 is an enzyme that can catalyze the synthesis of several compounds, including cyclic ADP-ribose (cADPR) and nicotinate-adenine dinucleotide phosphate (NAADP+). It can also act as a receptor, binding to CD31 on the surface of T cells. It localizes to the cell membrane. CD38 is used as a phenotypic marker for myeloid-derived suppressor cells, hematopoietic stem cells, granulocytes, T cells, and B cells. Examine the supplier's provided validation data when comparing CD38 antibodies for flow cytometry. Also look for application-specific recommendations, such as dilutions, protocols, sample types, and other helpful usage notes.