by studying the rate of synthesis of 300 cell proteins , we have identified two proteins ( 39 kda , pi = 6.2 , and 60 kda , pi = 5.6 ) whose synthesis rises at least 10-fold when dna replication and mitosis are prevented following intercellular contact or butyrate treatment , and another ( 64 kda , pi = 5.6 ) whose synthesis rises at least 10-fold when cell growth stops by contact , both in the presence of butyrate and in the absence of butyrate ( untreated confluent cells ) .
C0026255
mitosis
C0007634
cells