Which is NOT a function of collagen?

Collagen primarily functions to provide structural support and tensile strength in tissues, and its roles extend into various biological processes, such as cell migration, adhesion, and tissue repair. Cell migration involves cells moving through tissue, a process that collagen can influence by forming a scaffold and providing a guide for cells to follow. Cell adhesion refers to the ability of cells to attach to the extracellular matrix, where collagen plays a key role in interacting with cell surface receptors. Tissue repair is closely associated with collagen, as it is a crucial component in wound healing and regeneration, forming a framework for new tissue to develop.

However, cell recognition does not directly involve collagen. Instead, it typically relates to molecular cues presented by surface proteins or other signaling molecules that facilitate the identification of specific cell types through receptors. While collagen can indirectly support some aspects of cell behavior, such as through providing a supportive environment for recognition processes to occur, it is not primarily responsible for the recognition of cells themselves. This distinction makes cell recognition the function that is not associated directly with collagen.