TABLE 2.

General features of bifidobacterial genomes

Microorganism	Statusa	Genome size (bp)	No. of ORFs	% G+C content	No. of rRNA operonsb	Reference
B. longum biotype longum NCC2705	C	2,266,000	1,730	60	4	384
B. longum biotype longum DJO10A	UF	2,375,800	1,811	59	4	NCBI source NZ_AABM00000000
B. adolescentis ATCC15703	C	2,084,445	1,564	59	5	NCBI source NC_008618
B. breve UCC2003	C	2,422,668	1,868	59	2	254
B. dentium Bd1	UF	∼2,600,000	∼2,270	59.2	NA	NCBI source (project ID 17583)

^aC, finished; UF, unfinished.

^bNA, not available.