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ADP-ribosylation of elongation factor 2 by diphtheria toxin: NMR spectra and proposed structures of ribosyl-diphthamide and its hydrolysis products.
The SS1P molecule is an ingenious example of protein engineering: the native Pseudomonas exotoxin protein consists of three domains: domain I targets cell surface receptors, domain II functions to translocate the molecule across a cell membrane and into the cell interior, and domain III catalyzes irreversible ADP ribosylation and inactivation of elongation factor 2 (EF2).
Phylogenetic place of a mitochondrion-lacking protozoan, Giardia lamblia, inferred from amino acid sequences of elongation factor 2.