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. 1975 Oct;72(10):3878–3882. doi: 10.1073/pnas.72.10.3878

Human pituitary growth hormone: a biologically active hendekakaihekaton peptide fragment corresponding to amino-acid residues 15-125 in the hormone molecule.

C H Li
PMCID: PMC433099  PMID: 812085

Abstract

A hendekakaihekaton peptide fragment has been prepared by cyanogen bromide cleavage of the NH2-terminal 134-residue fragment of human pituitary growth hormone. It was characterized by amino-acid and end-group analyses, exclusion chromatography, disc electrophoresis, circular dichroism, and ultracentrifugation. The fragment, corresponding to amino-acid residues 15-125 in the hormone molecule, possesses hepatic ornithine decarboxylase (EC 4.1.1.17; L-ornithine carboxy-lyase) stimulating, lactogenic, and somatotrophic activity. It has immunoreactivity in the microcomplement-fixation and radioimmunoassay experiments. The circular dichroism data indicate that the hendekakaihekaton peptide fragment is devoid of secondary and tertiary structure.

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Selected References

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