A family of proteins that remodel chromatin such that transcription factors can bind to promoter sequences in DNA, switching genes on. In Drosophila, the Trithorax-group (trxG) and Polycomb-group (PcG) proteins act antagonistically and interact with chromosomal elements, termed Cellular Memory Modules (CMMs).
|Tumor supressor genes||
A class of genes involved in prohibiting the growth of tumors. Examples are p16 and p53, dubbed the 'guardian of the genome'.
Tyrosine is one of the building blocks of protein that can be modified by the addition of a chemical tag, in this case, a phosphate group.