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Isolation and Partial Characterization of Ribonuclease Inhibitor from Goat Liver

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Ribonuclease inhibitor (RI), a 50 kDa protein, has been found both in mammalian and nonmammalian tissues. We have isolated RI from goat liver and partial characterization has been accomplished. For the isolation of RI, DEAE cellulose column chromatography followed by affinity chromatography using CNBr activated Sepharose 4B was performed. The inhibition of ribonucleolytic activity of Ribonuclease A has been checked by an agarose gel based assay. The antiangiogenic property of the protein was tested by the chorioallantoic membrane (CAM) assay. Results indicate inhibition of angiogenesis.

Keywords: CAM assay; Ribonuclease inhibitor; agarose gel based assay; angiogenesis

Document Type: Research Article


Affiliations: Department of Chemistry, Indian Institute of Technology, Kharagpur-721302, India.

Publication date: August 1, 2006

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  • Protein & Peptide Letters publishes short papers in all important aspects of protein and peptide research, including structural studies, recombinant expression, function, synthesis, enzymology, immunology, molecular modeling, drug design etc. Manuscripts must have a significant element of novelty, timeliness and urgency that merit rapid publication. Reports of crystallisation, and preliminary structure determinations of biologically important proteins are acceptable. Purely theoretical papers are also acceptable provided they provide new insight into the principles of protein/peptide structure and function.

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