Structure and variation of the mitochondrial genome of fishes

BMC Genomics

Table 4 Occurrence of wobble pairings in the stem regions of 22 tRNA genes in mt genome of 250 fishes

		AA stem (7 bp)	D stem (4 bp)	AC stem (5 bp)	T stem (5 bp)	Total	(Percentage)
Base pairs × 250 species		1750	1000	1250	1250	5250
	Ala	280	210	241	345	1076	20.50
	Asn	116	112	12	71	311	5.92
	Cys	288	146	47	68	549	10.46
L-strand	Gln	210	289	32	36	567	10.80
code	Glu	420	2	547	128	1097	20.90
	Pro	123	435	167	175	900	17.14
	Ser (UCN)^a	24	64	159	319	566	10.78
	Tyr	257	46	185	27	515	9.81
	Average (%)	12.27	9.31	9.93	8.35	13.29
	Arg	90	42	21	63	216	4.11
	Asp	78	18	80	131	307	5.85
	Gly	36	296	55	8	395	7.52
	His	55	67	34	38	194	3.70
	Ile	44	20	11	11	86	1.64
	Leu (UUR)^a	78	139	13	19	249	4.74
H-strand	Leu (CUN)^a	39	1	10	1	51	0.97
code	Lys	68	6	15	5	94	1.79
	Met	83	3	27	10	123	2.34
	Phe	113	14	44	54	225	4.29
	Ser (AGY)^a	26	38	61	77	202	3.85
	Thr	26	4	67	16	113	2.15
	Trp	20	216	17	34	287	5.47
	Val	43	16	4	21	84	1.60
	Average (%)	3.26	6.29	2.62	2.79	3.52
Coefficient of variation		0.944	1.209	1.458	1.258	0.842
Grand average (%)		6.54	9.93	6.72	6.03	7.07

^aDNA degeneracies are represented by IUB (International Union of Biochemistry) code: N(A C G T), R(A G), Y(C T)

ISSN: 1471-2164