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Biomedical subjects

D Chung

Publications and source records attributed to D Chung.

At least 91 records · Page 5Linked to original sources

Isolation and amino acid sequence of gamma-lipotropin from human pituitary glands.

gamma-Lipotropin has been purified to homogeneity from human pituitary glands. It consists of 56 amino acids with one residue each of Trp, Thr, Val, Tyr, and Phe. The amino acid sequence has been determined as follows: H-Glu-Leu-Thr-Gly-Gln-Arg-Leu-Arg-Gln-Gly-Asp-Gly-Pro-Asn-Ala-Gly-Ala-Asp-Asp-G ly-Pro-Gly-Ala-Gln-Ala-Asp-Leu-Glu-His-Ser-Leu-Leu-Val-Ala-Ala-Glu-Lys-Lys-Asp- Glu-Gly-Pro-Tyr-Arg-Met-Glu-His-Phe-Arg-Trp-Gly-Ser-Pro-Pro-Lys-Asp-OH. Comparison with the structure of the ovine and porcine hormones reveals that the 23-amino-acid sequence at the COOH terminus is highly conserved in evolution.

Amino Acid Sequence↗

Isolation, characterization, and synthesis of a corticotropin-inhibiting peptide from human pituitary glands.

A corticotropin-inhibiting peptide (CIP) has been isolated from human pituitary extracts. It consists of 32 amino acids with a proposed sequence identical to residues 7--38 of corticotropin (ACTH). The peptide has been synthesized by the solid-phase method. The melanotropic activity of the peptide is estimated to be 30% of the potency of ACTH. It is devoid of corticosteroidogenic activity but is able to inhibit ACTH-stimulated corticosterone production in isolated rat adrenal cells.

Adrenocorticotropic Hormone↗

Isolation, characterization, and amino acid sequence of melanotropins from camel pituitary glands.

The isolation of two beta-melanotropins and two alpha-melanotropins from camel pituitary glands has been described, and their amino acid sequences have been determined. Two of them are identified as alpha-melanotropin and deacetylated alpha-melanotropin. There are also two beta-melanotropins whose structures are identical with the bovine hormone except that one has glycine in position 2 and the other glycine in position 2 as well as glutamine in position 8. The melanocyte-stimulating and lipolytic activities of these four camel melanotropins have been investigated by in vitro assay procedures.

Amino Acid Sequence↗