All human "True" helper cells (Leu 3+ 8-) express acid alpha naphthyl acetate esterase.
D006801:Humans; D009283:Naphthol AS D Esterase / Q000032:analysis*; D006377:T-Lymphocytes, Helper-Inducer / Q000201:enzymology*
D009283:Naphthol AS D Esterase