👉 Esterlin is a type of protein that has been identified in various organisms, including humans and animals. It is made up of two amino acids - Lysine (Lys) and Methionine (Met). Esterlin plays an important role in muscle function, as it helps to transport proteins into the muscles and facilitates their degradation through a process called catabolism. Esterins are also found in the liver and pancreas, where they play a crucial role in metabolism and