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. 2004 Feb 25;101(2):155–161. doi: 10.1016/j.virusres.2004.01.006

Table 3.

Synonymous codon usage in SARSCoV^a, ^b, ^c

AA^a	Codon	RSCU	N^b	AA^a	Codon	RSCU	N^b

Ala	GCU	2.08	531	Ile	AUU	1.72	410
	GCC	0.58	147		AUC	0.67	159
	GCA	1.13	288		AUA	0.62	148
	GCG	0.22	55	Cys	UGU	1.27	280
Gly	GGG	0.17	37		UGC	0.73	160
	GGA	0.85	182	Thr	ACU	1.66	427
	GGC	0.95	202		ACC	0.59	153
	GGU	2.02	431		ACG	0.18	46
Val	GUU	1.71	479		ACA	1.57	406
	GUC	0.67	188	Asn	AAU	1.24	449
	GUA	0.83	232		AAC	0.76	277
	GUG	0.78	219	Gln	CAA	1.16	298
Leu	UUA	1.04	238		CAG	0.84	214
	UUG	1.10	251	Tyr	UAU	1.12	345
	CUU	1.79	409		UAC	0.88	270
	CUC	0.83	191	His	CAU	1.29	187
	CUA	0.64	147		CAC	0.71	103
	CUG	0.60	138	Asp	GAU	1.24	463
Phe	UUC	0.77	260		GAC	0.76	282
	UUU	1.23	414	Glu	GAA	1.04	354
Pro	CCU	1.74	247		GAG	0.96	326
	CCC	0.40	57	Lys	AAA	1.04	421
	CCA	1.70	241		AAG	0.96	388
	CCG	0.16	22	Arg	CGU	1.77	153
Ser	UCU	1.96	310		CGC	0.72	62
	UCC	0.42	67		CGA	0.44	38
	UCA	1.70	270		CGG	0.09	8
	UCG	0.23	36		AGA	2.08	180
	AGU	1.17	186		AGG	0.90	78
	AGC	0.52	82

^a

AA is the abbreviation of amino acid.

^b

N represents the number of occurrence of each sense codon.

^c

The preferentially used codons for each amino acid are displayed in bold.