cell surface receptor signaling pathway involved in cell-cell signaling +
cell surface receptor signaling pathway involved in heart development +
collagen-activated signaling pathway +
cytokine-mediated signaling pathway +
enzyme-linked receptor protein signaling pathway +
The series of molecular signals initiated by an extracellular ligand binding to a receptor on the surface of the target cell, where the receptor possesses catalytic activity or is closely associated with an enzyme such as a protein kinase, and ending with the regulation of a downstream cellular process, e.g. transcription.