ligandin , a protein binding some carcinogens , steroids and other substances in the rat liver , has been found by means of indirect immunofluorescence in the gonad cells of different types : embryonic and mature leidig cells in testes , ovarian thecal cells at the maturation stages ( theca interna , atretic follicles and interstitial cells ) and luteal cells of corpus luteum at pregnancy .
C0024156
luteal cells
C0010092
corpus luteum