Modified cellular substrates used as linkers for increased cell

Drug – bio-affecting and body treating compositions – Radionuclide or intended radionuclide containing; adjuvant...

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424 8591, 536 184, 514 8, 530389, 530395, 530399, 530390, 530391, A61K 39395, A61K 3710, A61K 4300, C07H 1500

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050573012

ABSTRACT:
Modified cellular substrates are used as linking groups that are recognized as cellular substrates by intracellular metabolic enzymes. The linking groups function to attach a ligand, such as a drug or radionuclide, to a targeting protein, such as an antibody or antibody fragment. The false substrate structure of the linking groups causes increased cellular retention of the linking group/ligand conjugate because the enzymes used for catabolism of the substrate are inhibited by the false substrate structure of the linking group.

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