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W W Bromer

Publications and source records attributed to W W Bromer.

16 recordsLinked to original sources
PubMed1988

Isolation and characterization of a sulfoxide and a desamido derivative of biosynthetic human growth hormone.

Two derivatives of biosynthetic human growth hormone, a sulfoxide and a mixture of two monodesamido isomers, have been isolated and characterized. The sulfoxide derivative arises from an oxidation of Met-14. The major site of deamidation is at Asn-149 with a minor site at Asn-152. In addition, a fraction has been isolated from a sample of human growth hormone that was maintained at 40 degrees C for 2 weeks. This fraction, the isolated impurities fraction, contains the sulfoxide and the desamido forms, thereby demonstrating that these derivatives are the primary degradation products of biosynthetic human growth hormone. The sulfoxide, the desamido, and the isolated impurities fraction exhibit full biological activity.

Amino Acid Sequence↗
PubMed1968

Porcine proinsulin: characterization and amino acid sequence.

Proinsulin in nearly homogeneous form has been isolated from a preparation of porcine insulin. A molecular weight close to 9100 was calculated from the amino acid composition and from sedimentation-equilibrium studies. Through the action of trypsin this single-chain protein is transformed to desalanine insulin by cleavage of a polypeptide chain connecting the carboxy-terminus of the B chain to the amino-terminus of the A chain of insulin. The amino acid sequence of this connecting peptide was found to be Arg-Arg-Glu-Ala-Gln-Asn-Pro-Gln-Ala-Gly-Ala-Val-Glu-Leu-Gly-Gly-Gly-Leu-Gly-Gly-Leu-Gln-Ala-Leu-Ala-Leu-Glu-Gly-Pro-Pro-Gln-Lys-Arg.

Amino Acid Sequence↗