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Production of Radiolabeled E-Peptide


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  • Product Description

Ea4 peptide of rainbow trout pro-IGF-I has been shown to exert anti-cancer activities in human cancer cell lines. Kou and Chen (2003) have shown that the trout Ea-4 peptide could bind specifically with a binding component on the membrane of neuroblastoma cells (SK-NF-1). In order to characterize this binding component, a radio-labeled ligand with high specific activity will be required. In this study, effort was made to label trout Ea4-peptide by phosphorylation by protein kinase A (PKA) with radioactive ATP. Recombinant PKA4 peptide was prepared by adding 5 amino acid residues to the carboxyl-terminal of the trout Ea4-peptide. Following partial purification, recombinant PKA4 peptide and Ea4-peptide were active in mitogenesis in mouse fibroblast cells and morphological differentiation in SK-N-SH neuroblastoma cells. By protein kinase reaction, recombinant PKA4 peptide was labeled with 32P-ATP. Both rtEa4 and PKA4 peptides were labeled with 32P using the PKA enzyme. PKA4 peptide was labeled at levels over 10 times the expected values. Four serine phosphorylation sites and 3 threonine phosphorylation sites on the rtEa4 peptide may have contributed to the phosphorylation.

Product Specifications
SKU :COC28475
AuthorChristine Sallum
Number of Pages76
Publishing Year6/20/2010
Edition1 st
Book TypeBiology, life sciences
Country of ManufactureIndia
Product BrandLAP LAMBERT Academic Publishing
Product Packaging InfoBox
In The Box1 Piece
Product First Available On ClickOnCare.com2015-07-29 00:00:00
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