Aqp 3 in the spiral limb, vestibular lip, internal and external sulci, basilar membrane and basilar membrane crest, endolymphatic sac and duct, membranous semicircular canal and utricle and saccular macula; Aqp3在螺旋韧带、前庭唇、内、外螺旋沟、基底膜和基底膜嵴、内淋巴囊和内淋巴管、膜半规管和椭圆囊、球囊斑等处显示荧光染色。