we found that 1 ) there are detectable human igf i- and ii-like substances in all extracts , 2 ) igf values obtained in the skeletal extracts were not caused by binding protein artifacts , 3 ) in general there is more igf ii than igf i , and 4 ) the skeletal tissue levels of the igfs are comparable with their respective serum levels .
C0021665
igf i
C0037657
igfs