Table 2.

Summary of selections

Initially randomized length	70	60	40	20	17
Final pool at selection cycle	8	4	4	5	9
RNA recovery in final elution	18/17%a	26%	34%	17%	5%
Number of clones sequenced	158	48	50	49	26
Abundance of the CYA motif	81%	67%	72%	63%	0%
Independent isolations, CYA motif	19	11	15–16b	4–6b	0

^aThe two figures correspond to two parallel selections as described in Materials and Methods.

^bSee text for explanation of range of possible independent isolations.