Table 2.

Codon Usage in C. glutamicum and C. efficiens

			Fraction valueb
Codon	Amino acid	Rare codona	C. glutamicum	C. efficiens
GCA	Ala		30.66	12.29
GCC	Ala		27.18	54.41
GCG	Ala		23.15	28.82
GCT	Ala		24.96	8.75
TGC	Cys		4.87	6.33
TGT	Cys		2.66	2.81
GAC	Asp		26.11	34.68
GAT	Asp		32.89	29.26
GAA	Glu		35.50	18.10
GAG	Glu		27.41	42.27
TTC	Phe		22.87	26.53
TTT	Phe		13.78	3.82
GGA	Gly		15.43	12.47
GGC	Gly		33.34	37.00
GGG	Gly	+	6.97	18.19
GGT	Gly		24.44	31.09
CAC	His		14.52	19.77
CAT	His		7.22	8.68
ATA	Ile	+	2.05	1.89
ATC	Ile		33.55	42.38
ATT	Ile		21.48	5.21
AAA	Lys		14.27	5.58
AAG	Lys		20.75	17.38
CTA	Leu	+	5.94	1.78
CTC	Leu		22.05	33.67
CTG	Leu		27.38	47.63
CTT	Leu		17.01	8.15
TTA	Leu	+	5.31	1.38
TTG	Leu		19.99	6.08
ATG	Met		21.90	19.52
AAC	Asn		21.94	18.40
AAT	Asn		11.29	6.26
CCA	Pro		16.80	6.76
CCC	Pro		9.83	20.98
CCG	Pro		10.38	21.56
CCT	Pro		11.26	3.94
CAA	Gln		13.23	3.33
CAG	Gln		20.76	31.64
AGA	Arg	+	2.71	1.94
AGG	Arg	+	3.79	4.73
CGA	Arg	+	6.73	4.07
CGC	Arg		24.54	26.91
CGG	Arg	+	5.13	16.99
CGT	Arg		13.50	12.90
AGC	Ser		10.89	8.91
AGT	Ser	+	5.28	3.76
TCA	Ser	+	8.43	4.01
TCC	Ser		21.01	25.23
TCG	Ser	+	7.71	7.91
TCT	Ser		10.99	2.43
ACA	Thr	+	7.90	4.23
ACC	Thr		32.14	46.33
ACG	Thr		8.96	10.18
ACT	Thr		12.51	3.22
GTA	Val	+	8.41	5.23
GTC	Val		22.22	34.05
GTG	Val		29.01	37.03
GTT	Val		21.03	9.58
TGG	Trp		14.13	13.21
TAC	Tyr		14.40	13.35
TAT	Tyr		7.45	5.00

^aRare codons are adapted from Malumbres et al. (1993)

^bFraction value represents the number of codons per 1000 bases