Words similar to psittaci

Example sentences for: psittaci

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The tryptophan operon in C. psittaci is incomplete in that genes encoding the two subunits of anthranilate synthase ( trpAa and trpAb ) are absent.
Comparison of these sequences with that of the well studied TrpEa from Salmonella typhimurium shows C. trachomatis TrpEa (but not C. psittaci TrpEa) to have the following changes at critical residues ( S. typhimurium numbering): G61 → N61, G211 → R211, F/L212 → R212, and G234 → K234.
A rationale for inclusion of kprS and kynU in the C. psittaci tryptophan operon can be visualized from an examination of Figure 2. The ability of C. psittaci to synthesize L-tryptophan requires an alternative source of anthranilate (other than chorismate) as C. psittaci lacks anthranilate synthase.
Did the C. psittaci trpoperon originate by lateral gene transfer?
Because the presence of the tryptophan-pathway enzymes varies so markedly, even between closely related stains, one cannot be certain at this point that the tryptophan-recapture cycle is uniquely characteristic of C. psittaci.