Table 1.

Expression of A type 1, 2 and 3 antigens in the appendages

		AR-1	BA
eccrine glands	intraepidermal duct cells	+	+
	intradermal duct cells	+	+
	secretory cells
	dark cells	+*	+*
	clear cells	–	–
	luminal secretions	+*	+*
apocrine glands	duct cells	–	–
	secretory cells	–	–
	luminal secretions	–	–
sebaceous glands		–	–
hair follicle		–	–

+*: detected only from secretor individuals.