Interacts with ENG/endoglin, TGFBR2 and TGFBR3. Interacts with PPP1CC. Present along the entire length of the flagellum, including principal and endpiece, and more predominantly in the midpiece region. Expression is elevated in spermatocytes, this expression is maintained high in the round spermatids with a decreased in elongated spermatid. Belongs to the dynein light chain Tctex-type family.