this study is concerned with the fate of the nucleolar contents , particularly nucleolar rna , during mitosis mitotic cells harvested from monolayer cultures of chinese hamster embryonal cells , kb6 ( human ) cells , or l929 ( mouse ) cells were allowed to proceed into interphase in the presence or absence ( control ) of 0.04-0 08 microg/ml of actinomycin d , a concentration which preferentially inhibits nucleolar ( ribosomal ) rna synthesis 3 hr after mitosis , control cells had large , irregularly shaped nucleoli which stained intensely for rna with azure b and for protein with fast green .
C0026255
mitosis
C0007634
cells