TABLE 2.

Details of nucleotide substitutions and levels of divergence between the rRNA operons of Halobacteriales species harboring multiple heterogeneous copies

Comparison	Nucleotide differences				% Divergencec
	Lengtha	No. of substitutions	No. of indelsb	Total no.
Haloarcula marismortui
SSU-A and -B	1,472	74	0	74	5.0
LSU-A and -B	2,922	39	0	39	1.3
ITS-A and -B	411	65	36	101	24.6
H. carlsbadense
SSU-A and -B	1,476	95	5	100	6.8
LSU-A and -B	2,860	76	1	77	2.7
ITS-A and -B	466	110	119	229	49.1
Natrinema sp. strain XA3-1
SSU-A and -B	1,475	68	5	73	4.9
SSU-A and -C	1,475	69	5	74	5.0
SSU-A and -D	1,475	68	5	73	4.9
SSU-B and -C	1,475	1	0	1	0.1
SSU-B and -D	1,475	2	0	2	0.1
SSU-C and -D	1,475	1	0	1	0.1
LSU-A and -B	2,843	53	0	53	1.9
LSU-A and -C	2,894	30	0	30	1.0
LSU-A and -D	2,867	25	0	25	0.9
LSU-B and -C	2,843	35	0	35	1.2
LSU-B and -D	2,843	54	0	54	1.9
LSU-C and -D	2,867	32	0	32	1.1
ITS-A and -B	434	0	0	0	0
ITS-A and -C	434	0	0	0	0
ITS-A and -D	434	0	0	0	0
ITS-B and -C	434	0	0	0	0
ITS-B and -D	434	0	0	0	0
ITS-C and -D	434	0	0	0	0

^aNumber of nucleotides at which the sequences were compared.

^bNumber of nucleotide insertions or deletions.

^cPercentage of divergent nucleotide positions.