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. 1981 Apr;78(4):2388–2392. doi: 10.1073/pnas.78.4.2388

Detection of phosphotyrosine-containing 34,000-dalton protein in the framework of cells transformed with Rous sarcoma virus.

Y S Cheng, L B Chen
PMCID: PMC319351  PMID: 6166009

Abstract

Phosphotyrosine-containing 34,000-dalton protein is detected by treatment of a two-dimensional gel of cellular framework with 1 M NaOH at 40 degrees C for 1 hr. The alkali-resistant 32PO4-labeled 34,000-dalton protein is detected in various cell lines transformed by Rous sarcoma virus but not in lines transformed by simian virus 40, polyoma virus, herpes simplex II virus, adenovirus type 2, or chemical carcinogens. In addition, interferons or fibronectin matrices have no detectable effect on the phosphorylation of the 34,000-dalton protein in Rous sarcoma virus-transformed cells.

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