TABLE 3.

Codon usage of phage P22 ORFs (in boldface) and those of its host, S. enterica

	U			C			A			G
U	F	45	72	S	9	19	Y	52	73	C	39	57	U
	F	55	28	S	11	14	Y	48	27	C	61	43	C
	L	22	25	S	21	17	Stop	31	63	Stop	46	30	A
	L	27	15	S	19	14	Stop	24	7	W	100	100	G
C	L	6	13	P	12	22	H	56	71	R	8	34	U
	L	9	8	P	16	15	H	44	29	R	15	32	C
	L	12	6	P	36	18	Q	46	35	R	12	8	A
	L	24	34	P	37	45	Q	54	65	R	15	12	G
A	I	30	52	T	15	21	N	51	63	S	15	17	U
	I	32	27	T	21	36	N	49	37	S	25	19	C
	I	38	22	T	29	18	K	47	75	R	23	9	A
	M	100	100	T	34	24	K	53	25	R	27	5	G
G	V	17	28	A	16	19	D	53	72	G	17	31	U
	V	19	19	A	16	24	D	47	28	G	28	38	C
	V	27	22	A	33	19	E	57	61	G	27	14	A
	V	37	32	A	35	38	E	43	39	G	27	17	G

^aThe P22 ORFs were analyzed using DNAMAN, while data on 223 S. enterica coding regions in the Codon Usage Database (http://www.kazusa.or.jp/codon/cgi-bin/showcodon.cgi?species=Salmonella+enterica+[gbbct]) were used for comparison. The left-hand column contains the first nucleotides of the codons. The second nucleotides of the codons are listed across the top, while the third nucleotides are listed in the right-hand column. The numbers represent percentages. The amino acids or functions are given on the left.