Accession Number : AD0741684

Title :   Some Physico-Chemical Properties of a Stable Albumin Free Radical.

Descriptive Note : Interim rept.,

Corporate Author : NAVAL AIR DEVELOPMENT CENTER WARMINSTER PA CREW SYSTEMS DEPT

Personal Author(s) : Forman,Barbara J. ; Polis,B. David

Report Date : 29 DEC 1971

Pagination or Media Count : 21

Abstract : Crystalline bovine serum albumin was converted to a stable free radical form by reaction with nitrosyl disulfonate in alkaline solution. The purified free radical protein showed a characteristic single EPR peak at G=2, both in aqueous solution at room temperature and in the solid state at liquid nitrogen temperatures. The free radical signal was intensified by visible light. The free radical state of the protein was characterized by unique changes in the visible, ultraviolet, and fluorescence spectra. Attempts to quantitate the number of free radical sites on the albumin by titration with dithiothreitol indicated that the number of radical sites correlated with the number of tyrosine and tryptophan residues in the molecule. (Author)

Descriptors :   (*SERUM ALBUMIN, *FREE RADICALS), (*PROTEINS, FREE RADICALS), SYNTHESIS(CHEMISTRY), SULFONATES, ORGANIC SULFUR COMPOUNDS, PARAMAGNETIC RESONANCE, QUANTITATIVE ANALYSIS, VOLUMETRIC ANALYSIS

Subject Categories : Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE