Receptor for kinesin thus involved in kinesin-driven vesicle motility. Parallel homodimers formed between the membrane-bound and the cytosolic form, and also between 2 cytosolic forms. Vesicle membrane protein anchored to the endoplasmic reticulum. In testis, localized at sperm surface. Additional isoforms seem to exist. Expressed in male brain, heart, kidney, liver, lung, spleen and testis. Belongs to the kinectin family.