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Pc | Polycomb group protein Pc; 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. Component of the PcG multiprotein PRC1 complex, a complex that acts via chromatin remodeling and modification of histones; it mediates monoubiquitination of histone H2A 'Lys-118', rendering chromatin heritably changed in its expressibility. Promotes locus-specif [...] (390 aa) | ||||
nab | NGFI-A-binding protein homolog; Transcriptional regulator that can both act as a coactivator or a corepressor depending on the context. Lacks DNA-binding domains and acts by associating with other transcription factors such as rotund (rn) and squeeze (sqz). Acts as a coactivator of sqz and is required to limit the number of neurons that express the LIM-homeodomain gene apterous and to specify Tv neuronal fate. Acts as corepressor of rn in wing development and is required to limit the expression of wingless (wg) in the wing hinge, where wg plays a mitogenic role. Belongs to the NAB family. (625 aa) |