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Scm | Polycomb protein Scm; Polycomb group (PcG) protein. PcG proteins act by forming multiprotein complexes, which are required to maintain the transcriptionally repressive state of homeotic genes throughout development. PcG proteins are not required to initiate repression, but to maintain it during later stages of development. They probably act via the methylation of histones, rendering chromatin heritably changed in its expressibility; Belongs to the SCM family. (877 aa) | ||||
TfIIB | Transcription factor IIB (TfIIB) encodes a basal transcription factor that binds to the TATA box-binding protein. It is required for the initiation of transcription by RNA polymerase II. (315 aa) |