👉 Collagens are a group of proteins that make up the extracellular matrix (ECM) in connective tissues and connective organs. Collagens are composed of fibrillar collagen molecules, which are interconnected with each other and with the cell membrane to form a network. Collagens play a crucial role in maintaining tissue integrity by providing structural support and promoting cell growth and differentiation. Collagens can be divided into two main types: type I collagen (type I-1) and type II collagen (
