TABLE 1.

General characteristics of the genomes of M. hyopneumoniae strains J and 7448 and M. synoviae^a

Characteristic	Mhy-J	Mhy-P	Msy
Total length (base pairs)	897,405	920,079	799,476
G+C content (%)	28	28	28
Total no. of CDSs	679	681	694
Genome constituting coding regions (%)	88	88	91
Average CDS length (base pairs)	1,178	1,190	1,058
No. of known proteins	412	421	464
No. of conserved hypothetical proteins	109	105	167
No. of hypothetical proteins	158	155	63
No. of rRNAs
16S	1	1	2
23S	1	1	2
5S	1	1	3
No. of tRNAs	30	30	34
No. of insertion sequencesb
IS3	2	0	0
tMH	(4)	2 (8)	0
ISMhp1	14	11	13

^aAbbreviations: Mhy-J, M. hyopneumoniae strain J; Mhy-P, M. hyopneumoniae strain 7448; Msy, M. synoviae.

^bNumber of copies of different insertion sequence families. The number of defective copies is shown in parentheses.