Triplet Analysis That Identifies Unpaired Regions of Functional RNAs

Table 1

Number and frequency of each triplet obtained from the primary sequences of the clones after the selection^(a).

	Second		U				C				A				G
	First	Third	U	C	A	G	U	C	A	G	U	C	A	G	U	C	A	G
Number of triplet	U		5	1	5	16	6	5	9	8	4	12	6	6	9	14	8	15
	C		7	10	7	10	7	8	6	7	8	7	5	8	8	13	4	10
	A		4	8	4	9	11	6	5	8	4	8	0	5	14	4	4	4
	G		11	9	9	11	10	14	7	12	9	3	6	6	8	13	7	13
Frequency of triplet	U		0.29	0.06	0.29	0.94	0.35	0.29	0.53	0.47	0.24	0.71	0.35	0.35	0.53	0.82	0.47	0.88
	C		0.41	0.59	0.41	0.59	0.41	0.47	0.35	0.41	0.47	0.41	0.29	0.47	0.47	0.76	0.24	0.59
	A		0.24	0.47	0.24	0.53	0.65	0.35	0.29	0.47	0.24	0.47	0.00	0.29	0.82	0.24	0.24	0.24
	G		0.65	0.53	0.53	0.65	0.59	0.82	0.41	0.71	0.53	0.18	0.35	0.35	0.47	0.76	0.41	0.76

^(a)Abundant triplets with frequency above 0.75 are indicated by boldface.