Table 2.

The Relative Solvent Accessibility of ABPαβγ ω⁺ Sites That Map to the Recombinant Cat Allergen Fel DI (PDB 1PUO)

	1PUO chain 1	ABPα		1PUO chain 2	ABPβγ
	All sites	Mouse and rat ω+	Mouse only ω+	All sites	Mouse and rat ω+	Mouse only ω+
No. of residues	68	4	5	67	29	17
No. buried	5	0	0	6	3	1
No. intermediate	22	0	0	19	6	2
No. exposed	41	4	5	42	20	14
Buried (%)	7.4	0.0	0.0	9.0	10.3	5.9
Intermediate (%)	32.4	0.0	0.0	28.4	20.7	11.8
Exposed (%)	60.3	100.0	100.0	62.7	69.0	82.4

The solvent accessibility values of cat Fel dl residues equivalent to ABPαβγ ω⁺ residues were calculated from the structure coordinates using the DSSP algorithm (Kabsch and Sander 1983). Relative accessibility scores were partitioned into three states: buried (<9% relative accessibility), intermediate (9%-35% relative accessibility), and exposed (≥36% relative accessibility), as described previously (Rost and Sander 1994).