👉 Tyrosine kinase is a type of enzyme that plays an important role in the biosynthesis and degradation of tyrosine, which is a precursor to many essential amino acids. It is involved in several cellular processes such as neurotransmission, protein synthesis, and cell signaling. In cells, tyrosine kinases are responsible for regulating the levels of tyrosine in various tissues and organs. They also play a crucial role in the regulation of insulin sensitivity, which plays an important role in glucose metabolism