TABLE 4.

PY100 virion proteins detected by MS

Banda	Observed avg mass (kDa)	ORF	Theoretical avg mass (kDa)	Amino acids	No. of peptides found	Sequence coverage (%)	Putative functionb	N-terminal peptidec
A	51	70	53.9	502	7	15.1	Tail-length tape measure protein
B	48	55	50.0	453	7	16.6	Portal protein	+
	48/40	76	42.7	391	4	13.0	-
C	40	65	42.6	379	3	5.3	-
D	38	78	37.7	351	6	21.1	Tail fiber
E	35	59	37.2	335	15	30.7	Head protein
	35	83	27.7	255	7	19.2	Tail fiber
F	28	77	24.8	221	7	23.9	-	+
	28	71	23.7	215	4	19.0	-	+
G	19	57	42.6	386	3	7.4	Head protein
	19	64	19.8	176	8	44.3	-
	19	58	17.2	162	8	38.8	-	+
H	16	66	15.2	142	7	32.4	-
	16	63	14.2	122	3	22.1	-
	16	75	13.1	118	1	9.3	-

^aSee Fig. 3.

^b-, The annotation was “phage related, unknown function.”

^c+, Peptides were found corresponding to the deduced N terminus.