TABLE 2.

The restriction fragments containing specific rrn operons isolated from S. typhi Ty2 following digestion with SpeI, XbaI, and BlnI^a

rrn operon	I-CeuI junction fragment	Restriction fragment	Fragment size (kb)
rrnGH	BA	BlnI-C	6.8
rrnGH	BA	SpeI-F	6.8
rrnHG	GA′	SpeI-AA	10.0
rrnDE	CG	SpeI-EE	10.1
rrnCA (left arm)	C	BlnI-TU	9.9
rrnCA (left arm)	C	XbaI-DD	9.9
rrnCA (right arm)	E	BlnI-V	6.5
rrnB	EF	XbaI-EE	13.2
rrnCA (right arm)	E		6.5
rrnEC (left arm)	F		6.0
rrnCA	CE	SpeI-FF	17.4
rrnB	EF		13.2
rrnEC	FD		10.6
rrnB	EF	BlnI-X	13.2
rrnEC (left arm)	F		6.0
rrnEC (right arm)	D	BlnI-Y	5.8
rrnAD	DB	BlnI-Z	12.5
rrnAD	DB	SpeI-GG	12.5

^aThe rrn operons were isolated from S. typhi Ty2, which is of GT9 and RT5, as illustrated in Fig. 1B. The restriction fragments and rrn operons were identified to Fig. 1 in reference 12.