Linked Life Data

2324226

Source:http://linkedlifedata.com/resource/pubmed/id/2324226

Statements in which the resource exists.
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pubmed-article:2324226pubmed:abstractTextThe determination of molecular weights for certain proteins has been performed. This has involved the on-line coupling of gradient elution, reversed-phase high-performance liquid chromatography (RP-HPLC) with low-angle laser light scattering (LALLS) detection. A new 1.5-micron, non-porous, Monosphere RP-C8 column has been used in order to perform fast and conventional RP-HPLC gradients (5-45 min). Traditional specific refractive index increment (dn/dc) and refractive index (n) measurements have been performed in order to derive absolute weight-average molecular weight (Mw) information for ribonuclease A, lysozyme, and bovine serum albumin. Standard mixtures of known concentrations of each protein have been separated using reversed-phase gradients utilizing acetonitrile with on-line LALLS determination of excess Rayleigh scattering factors. Accurate Mw data have been obtained for all three proteins, but only under certain, conventional reversed-phase gradient elution conditions. Between 5-10 min of fast gradient elution, each protein appears to exhibit unusual Mw values, suggestive of aggregate formations. Methods have been developed to define the nature of such aggregates. The on-line coupling of modern RP-HPLC for biopolymers with LALLS represents a major step forward in the ability of bioanalytical chemists to determine the nature (monomer versus aggregate) of such materials. Other classes of biopolymers should prove suitable for studies with the same RP-HPLC-LALLS-UV approaches.lld:pubmed
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pubmed-article:2324226pubmed:dateRevised2007-11-14lld:pubmed
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pubmed-article:2324226pubmed:articleTitleDetermination of biopolymer (protein) molecular weights by gradient elution, reversed-phase high-performance liquid chromatography with low-angle laser light scattering detection.lld:pubmed
pubmed-article:2324226pubmed:affiliationDepartment of Chemistry, Northeastern University, Boston, MA.lld:pubmed
pubmed-article:2324226pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:2324226pubmed:publicationTypeResearch Support, U.S. Gov't, P.H.S.lld:pubmed
pubmed-article:2324226pubmed:publicationTypeResearch Support, Non-U.S. Gov'tlld:pubmed
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