Bibliography: leaves 112-140. / xi, 141, [39] leaves, [8] leaves of plates : ill. ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / The aims of this thesis are to determine the initial cleavage sites of purified pepsin in long-R3-IGF-I and assess whether the resulting cleavages affect biological activity, to design and produce analogues of long-R3-IGF-I which contain amino acid substitutions, to characterise the resulting analogues for pepsin resistance and retention of biological activity and to assess the stability of the long-R3-IGF-I analogues under in vivo conditions using luminal stomach flushings. / Thesis (Ph.D.)--University of Adelaide, Dept. of Biochemistry, 1996