Purification and structure of PDGF, C.-H. Heldin; the PDGF genes and their regulation, C. Betsholtz; PDGF receptors - structure and mechanisms of action, L. Claesson-Welsh; signal transduction via the PDGF beta-receptor, J.A. Cooper and A. Kazlauskas; platelet-derived growth factor in vivo, E.W. Raines and R. Ross; PDGF in the developing embryo, S.L. Palmieri et al; PDGF in cell transformation, W.J. LaRochelle et al; PDGF and its receptors in human tumour cells, B. Westermark.