C., Simpson M. that are important for neuronal development (16, 17). Matricellular proteins are secreted proteins that are closely associated with the extracellular matrix. Rather than being structural components of the extracellular matrix, however, such proteins contribute to cell signaling by acting as BCL2L5 modulators of cell surface receptors. For example, Cyr61 (cysteine-rich 61; CCN1), … Continue reading C