Interacts with ENG/endoglin, TGFBR2 and TGFBR3 (PubMed:16982625). Interacts with PPP1CC (PubMed:23789093). Present along the entire length of the flagellum, including principal and endpiece, and more predominantly in the midpiece region. Ubiquitously expressed (PubMed:16982625). Expressed in testis (at protein level) (PubMed:23789093). Belongs to the dynein light chain Tctex-type family.