the opioid peptides alpha- and beta-endorphin and [ d-ala2 , met5 ] enkephalin were investigated for their effect on the proliferation of resting and activated rat splenic lymphocytes in vitro . beta-endorphin enhanced the proliferative response of spleen cells to the t cell mitogens concanavalin a and phytohemagglutinin .
C0205753
opioid peptides
C0014298
enkephalin