Table 3. Residues in the structure too ambiguous to identify definitively.

	Chain A	Chain B	Chain C	Chain D
Left as alanine	E20	E2, Q6, E20, K31, E169, L174	K85, P90, E92	E20, R81, L84, S91, E92, E185
Left as glycine	P90, Q230	D86	H89, S91, Q227	S170, A172, L174, D185, E182
Left as serine		R176, R178		R176, R178
Missing	K231–Q233	S170–T173, V228–Q233	V228–Q233	K85–P90, Q230–Q233