Highlights
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Two peptides SR11 and IR15 were obtained from tryptic digest of Abrus agglutinin.
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SR11 and IR15 are nontoxic and both have cell penetrating properties.
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Both the peptides entered cell via lipid raft-mediated endocytosis.
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Co-administration of peptides with Imatinib mesylate enhance the intracellular concentration of the drug in HeLa cells.