16S rRNA Model Base Pair Frequencies

Last modified on 18 July 2001.

Table Window:

Tables of base pair frequency and other selected data will appear here when you select the appropriate link from the base pair list at the left.

This screen also contains general reference information for 16S rRNA. Links to this information appear at appropriate places within the base pair frequency tables and associated help files.

16S rRNA Reference Sequence: Escherichia coli .

GenBank Accession #: J01695 Secondary Structure: (PostScript), (PDF)

Alignments Used:

Code Descriptions # Sequences

T Three Phylogenetic Domains/Two Organelles 8513

3 Three Phylogenetic Domains 7180

A Archaea 264

B (eu)Bacteria 5859

C Chloroplasts 182

E Eucarya 1054

M Mitochondria 1160

Code	Descriptions	# Sequences

T	Three Phylogenetic Domains/Two Organelles	8513
3	Three Phylogenetic Domains	7180
A	Archaea	264
B	(eu)Bacteria	5859
C	Chloroplasts	182
E	Eucarya	1054
M	Mitochondria	1160

The three phylogenetic domains are defined in (Woese, C. R., Kandler, O., & Wheelis, M.L. (1990) Proc. Natl. Acad. Sci. USA 87 4576-4579): Archaea, (eu)Bacteria, and Eucarya (nuclear).