<prompt> Aggrecan is:A receptor over plateletsA molecule present in osteoid tissueGranules in leukocytesImpoant component of cailage  <response>: Aggrecan is a proteoglycan, also known as cailage-specific proteoglycan core protein CSPCP or chondroitin sulfate proteoglycan 1. It is encoded by the ACAN gene. Aggrecan is an integral pa of the extracellular matrix ECM in cailagenous tissue and it withstands compression in cailage. 