Sayre MH, et al. (1992) Purification and properties of Saccharomyces cerevisiae RNA polymerase II general initiation factor a. J Biol Chem 267(32):23383-7
Abstract: RNA polymerase II initiation factor a was purified to apparent homogeneity from yeast whole cell extract and consisted of two highly charged polypeptides with apparent masses of 66 and 43 kDa. Separation and renaturation of the subunits showed that both were required for transcription activity. The native mass of factor a was estimated to be 240-260 kDa by gel filtration, but its sedimentation rate in a glycerol gradient was similar to that of a much smaller globular protein, suggesting an extended conformation. Factor a was required for utilization of six different eukaryotic promoters in vitro, indicating a general role in promoter-directed transcription by yeast RNA polymerase II.
|Status: Published||Type: Journal Article||PubMed ID: 1429681|
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