<prompt> True about p53 -Tumor suppressor geneProapoptoticArrest cell cycle inProtooncogene  <response>: Tumor protein p53, also known as p53, cellular tumor antigen p53 UniProt name, phosphoprotein p53, tumor suppressor p53, antigen NY-CO-13, or transformation-related protein 53 TRP53, is any isoform of a protein encoded by homologous genes in various organisms, such as TP53 humans and Trp53 mice. This homolog originally thought to be, and often spoken of as, a single protein is crucial in multicellular organisms, where it prevents cancer formation, thus, functions as a tumor suppressor. As such, p53 has been described as the guardian of the genome because of its role in conserving stability by preventing genome mutation. Hence TP53 is classified as a tumor suppressor gene 