PC2 (E3 SUMO-protein ligase CBX4 Chromobox protein homolog 4 Polycomb 2 homolog Pc2 hPc2)

PC2 is the human homolog of the drosophila 'polycomb' (Pc) protein which has been identified as a gene family member associated with a cellular memory system that is responsible for the inheritance of gene activity by progeny cells. The human Pc homolog gene is more closely related to a xenopus Pc homolog, XPc, than to a previously described human Pc homolog, CBX2 (hPc1). However, the hPc2 and CBX2/hPc1 proteins are shown to colocalize in interphase nuclei of human U-2 OS osteosarcoma cells, suggesting that the proteins are part of a common protein complex. The human protein is believed to function as a repressor of proto-oncogene activity and that interference with hPc2 function can lead to derepression of proto-oncogene transcription and subsequently to cellular transformation. Other reports describe PC2 as a protein that has SUMO E3 activity for the corepressors CtBP and CtBP2.\n\nApplications:\nSuitable for use in Immunofluorescence, ELISA, Western Blot and Immunoprecipitation. Other applications not tested.\n\nRecommended Dilution:\nImmunofluorescence: 1:100-1:400\nELISA: 1:10,000-1:40,000\nWestern Blot: 1:1000-1:4000\nImmunoprecipitation: 1:100\nOptimal dilutions to be determined by the researcher.\n\nStorage and Stability:\nMay be stored at 4 degrees C for short-term only. Aliquot to avoid repeated freezing and thawing. Store at -20 degrees C. Aliquots are stable for 12 months. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.

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