BRAF (B-Raf Proto-Oncogene, Serine/Threonine Kinase): BRAF (B-Raf Proto-Oncogene, Serine/Threonine Kinase) is a critical protein involved in the MAPK/ERK signaling pathway, which controls cell growth, division, and differentiation. Mutations in BRAF are linked to several cancers, including melanoma, thyroid, and colorectal cancer, as well as some non-cancerous conditions like cardiofaciocutaneous syndrome, affecting the heart, facial features,and skin.