Table 3. Sequential pure-purinic codons (frequencies per Mb) in prokaryotic genomes.

	Lysine		Arginine		Glutamic acid		Glycine
Codon	AAA	AAG	AGA	AGG	GAA	GAG	GGA	GGG	Σ
Thermophiles
AAA	332	291	147	133	363	306	130	76	1,778
AAG	254	313	163	218	316	325	147	90	1,827
AGA	205	184	109	117	204	184	93	56	1,154
AGG	139	200	111	183	231	273	113	81	1,331
GAA	423	375	164	184	404	378	148	90	2,167
GAG	256	367	161	290	325	480	134	124	2,137
GGA	227	250	126	146	192	199	157	86	1,382
GGG	104	121	57	95	85	124	59	36	681
Σ	1,940	2,102	1,037	1,365	2,121	2,270	982	638
Mesophiles
AAA	436	164	59	25	421	207	97	89	1,499
AAG	155	106	19	12	158	93	45	50	639
AGA	80	29	19	9	64	31	21	14	266
AGG	25	16	8	6	32	21	12	11	130
GAA	506	219	60	36	429	277	106	116	1,749
GAG	147	124	22	18	167	143	45	67	733
GGA	148	57	29	15	114	65	49	31	508
GGG	90	40	11	8	86	58	35	32	361
Σ	1,586	755	226	130	1,471	895	410	410