Table 1.

A list of amino acid residues in portal that contact the first ring of the dsDNA genome. Each tail spike interacts with three adjacent gp4 subunits (lists of contact residues in the three gp4 subunits). Gp4 subunits A, B, and C correspond, respectively, to the green, red and magenta subunits in Figure 6.

Portal residues in contact with dsDNA	Gp4 residues in contact with gp9 tail spike
	Subunit A	Subunit B	Subunit C
LEU 8	PRO 30	THR 5	THR 5
LYS 228	GLN 31	LYS 6	LYS 6
ARG 249	GLN 34	GLY 7	GLY 7
ASP 250	ALA 68	ASP 8	ASP 8
ILE 251	GLU 69	VAL 10
LYS 252		ARG 11
ASP 253		LEU 14
VAL 254		ASP 27
ASP 256		GLU 29
ASP 257		PRO 30
GLN 270		GLN 31
ARG 275		MET 33
TYR 277		GLN 34
LYS 290		ASN 65
		PRO 66
		PRO 67
		ALA 68
		GLU 69
		ASP 71