the actions of partially purified porcine platelet-derived growth factor ( pdgf ) and highly purified multiplication-stimulating activity ( msa ) ii and msa iii-2 , which are somatomedins , were investigated on the incorporation of [ 3h ] thymidine and [ 35s ] sulphate by fetal rat costal cartilage in vitro .
C0021666
msa
C0037657
somatomedins