ACAN (Aggrecan): ACAN is a gene that encodes aggrecan, a large proteoglycan found in the extracellular matrix of cartilage and other connective tissues. It plays a critical role in maintaining the structural integrity of cartilage and is essential for joint function. Mutations in ACAN can lead to skeletal disorders such as spondyloepimetaphyseal dysplasia, which affects bone and cartilage development....