title: A phylogenetic study of sulphation factor activity in 26 species.
abstract: Somatomedin (sulphation factor) activity was measured in 26 species by a porcine cartilage bioassay. Although non-dialysable inhibitory factors were present in many species, sulphation factor activity was present in the sera of all the vertebrates studied but was absent from the invertebrates.
mesh_terms: D000818:Animals; D001681:Biological Assay; D005075:Biological Evolution; D006801:Humans; D010802:Phylogeny; D013002:Somatomedins / Q000097:blood*; D014714:Vertebrates
chemical_list: D013002:Somatomedins