A Segment of DNA that Codes for 16S Ribosomal RNA

A Visual Comparison between Eleven Species of Gram-Negative Bacteria

Sequences taken from the GenBankdatabase.

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The organisms are as follows:

  • Neisseria sicca – the only gram-negative coccus considered inBacteriology 102.
  • Pseudomonas fluorescens – a non-fermentative rod.
  • Three enteric-like organisms: Vibrio cholerae, Photobacterium phosphoreum and Plesiomonas shigelloides.
  • Three relatively obscure enterics: our new organism (shown by initials"AH"),  Budvicia aquatica and Edwardsiella tarda.
  • Escherichia coli – the archetypal enteric – with twoclosely-related species, Shigella dysenteriae and Escherichiahermannii.

"Scrolling down memory lane..."

Neisseria sicca------------
Pseudomonas fluorescens----
Vibrio cholerae------------
Photobacterium phosphoreum-
Plesiomonas shigelloides---
"AH" (our new organism)----
Budvicia aquatica----------
Edwardsiella tarda---------
Shigella dysenteriae-------
Escherichia coli-----------
Escherichia hermannii------
Scroll right and left.

Genotypic Identification Page for a helpful
interpretation of what goes on here.

Page last modified on 11/4/01 at 6:00 PM, CST.
John Lindquist:  new homepage, complete site outline.
Department of Bacteriology, U.W.-Madison