👉 The term "ptyalins" is often used in medicine to refer to a type of protein that is found in the cytoplasm of cells. These proteins are responsible for the process of signal transduction, which is involved in many biological processes such as cell signaling, cell death, and immune response. The term "ptyalins" was coined by Dr. Michael J. Kappes in 1998 to describe this protein family in the context of cytoplasmic proteins