[Lactogenic receptors on cow granulosa cells]

Bovine prolactin (BPRL) binding to cow granulosa cells depending on the antral follicular diameter has been studied. The data obtained point to the existence of one type of low affinity PRL-binding sites on granulosa cells. No reliable differences in the parameters of BPRL interaction with lactogenic receptors in the dynamics of folliculogenesis have been found. The recombinant bovine growth hormone and BPRL competitive binding while interacting with lactogenic receptors has been shown that suggests action of these hormones at over the same binding sites on cow granulosa cells.