Table II.

Comparison of codon frequency usage in tomPRO1, tomPRO2, and general tomato genes

Amino Acid	Codon	tomPRO1	tomPRO2	Tomato
		%
Arg	CGA	14	12	9
	CGC	29′ a	5	7
	CGG	43" b	5	4
	CGU	14	29′	18
	AGA	0	36"	37"
	AGG	0	14	24′
Leu	CUA	7	10	9
	CUC	4	11	13
	CUG	10	14	7
	CUU	7	35"	30"
	UUA	28′	12	12
	UUG	42"	19′	30"
Ser	UCA	28′	21	26"
	UCC	0	7	13
	UCG	10	5	7
	UCU	14	28′	25′
	AGC	3	7	13
	AGU	45"	33"	16
Thr	ACA	24	35′	32′
	ACC	27′	9	22
	ACG	41"	6	8
	ACU	8	50"	38"
Pro	CCA	56"	40′	47"
	CCC	7	15	13
	CCG	22′	0	6
	CCU	15	45"	35′
Ala	GCA	13	32′	30′
	GCC	31′	13	18
	GCG	34"	4	5
	GCU	21	51"	46"
Gly	GGA	10	44"	38"
	GGC	27	22	13
	GGG	29′	11	11
	GGU	34"	24′	38"
Val	GUA	7	17	14
	GUC	24′	7	16
	GUG	48"	33′	25′
	GUU	20	43"	45"
Lys	AAA	58	55	46
	AAG	42	45	54
Asn	AAC	52	33	45
	AAU	48	67	55
Gln	CAA	76	44	64
	CAG	24	56	36
His	CAC	20	38	39
	CAU	80	63	61
Glu	GAA	76	51	52
	GAG	24	49	48
Asp	GAC	21	22	33
	GAU	79	78	67
Tyr	UAC	13	19	53
	UAU	87	81	47
Cys	UGC	0	43	46
	UGU	100	57	54
Phe	UUC	15	22	44
	UUU	85	78	56
Ile	AUA	4	25	18
	AUC	16	23	29
	AUU	80	52	52

Values are given of each codon in each amino acid. Trp, Met, and stop codons are not included.

^a′, Second-most frequently used codon. 

^b", Most frequently used codon.