the effects of n- ( 4-hydroxyphenyl ) retinamide ( hpr ) , a synthetic analogue of vitamin a , on cell morphology , cell cycle kinetics , cytoplasmic matrix , and expression of murine mammary tumor virus ( mumtv ) in mumtv-infected murine mammary tumor cells ( gr-3a ) were determined .
C1383501
cytoplasmic matrix
C0007634
cells