We investigated the initiation of synthesis of proteins in human lymphocytes exposed to the mitogen phytohemagglutinin (PHA) for 6 h. Radiolabeled proteins in three subcellular fractions, cytoplasmic, nuclear salt wash, and nuclear, were separated on polyacrylamide gels. Compared with cells incubated for the same time in the absence of PHA only two cytoplasmic proteins of Mr 51 and 60 kd showed increased synthesis in a dose-dependent fashion. Synthesis of the 60-kd protein shows the strongest correlation with rate of entry into the first S phase and with rate of cellular aggregation. Thus, the 60-kd protein appears to be a major early response-associated protein for entry of lymphocytes into the first S phase after PHA stimulation.
Early synthesis of specific cytoplasm proteins is correlated with the rate of exit of lymphocytes from the resting state.
- Views Icon Views
- PDF LinkPDF
- Share Icon Share
- Tools Icon Tools
- Search Site
D J Hall, J J O'Leary, A Rosenberg; Early synthesis of specific cytoplasm proteins is correlated with the rate of exit of lymphocytes from the resting state.. J Cell Biol 1 November 1984; 99 (5): 1814–1821. doi: https://doi.org/10.1083/jcb.99.5.1814
Download citation file: