Task: Named Entity Recognition
Input (English):  Human CD38 , a leukocyte receptor and ectoenzyme , is a member of a novel eukaryotic gene family of nicotinamide adenine dinucleotide + - converting enzymes : extensive structural homology with the genes for murine bone marrow stromal cell antigen 1 and aplysian ADP - ribosyl cyclase .
Output (English): Human CD38