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pho | Polycomb protein PHO; Polycomb group (PcG) protein that binds to the 5'- CNGCCATNNNNG-3' sequence found in the regulatory regions of many genes. 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. Probably targets the Esc/E(z) complex to DNA. Necessary but no [...] (520 aa) | ||||
vnd | Homeobox protein vnd; Ventral nervous system defective (vnd) encodes a Nk2-class homeodomain transcription factor that acts in a context-dependent manner as an activator or repressor. It has roles in neuroectoderm patterning, formation and specification of ventral neuroblasts and proper development of their cell lineages. (723 aa) |