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. 1996 Sep;5(9):1928-30.
doi: 10.1002/pro.5560050920.

Purification and crystallization of cyclin-dependent kinase inhibitor p21

D R Mayrose  1 , M A Nichols, Y Xiong, H Ke
Affiliations

Purification and crystallization of cyclin-dependent kinase inhibitor p21

D R Mayrose et al. Protein Sci. 1996 Sep.

Abstract

p21, a universal inhibitor of mammalian cyclin-dependent kinases (CDK), regulates cell cycle progression by forming various distinct protein complexes with cyclins, CDKs, and the proliferating cell nuclear antigen. We have overexpressed recombinant human p21 in E. coli and purified active p21 to near homogeneity on a large scale. Crystals of recombinant p21 have been grown in the space group P2(1) a = 157.4, b = 152.7, c = 90.6 A, and beta = 92.7 degrees. The diffraction data of the recombinant p21 have been collected to 2.5 and 3.5 A resolution for the native crystal and two heavy atom derivatives of mercury and iridium.

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