Table 3.

Pairs of amino acids that form hydrogen bonds within 5 angstroms radius of residues with greatest variation.

Residue position	E. sp. SH0S1	E. sp. SH0S7	E. sp. SH3S2
10	Thr-18 – Leu-14 Leu-7 – Phe-4	Ser-15 – Phe-11 Leu-13 – Pro-9 Leu-14 – Val-10 Thr-18 – Leu-14	Phe-11 – Leu-7 Ser-15 – Phe-11 Ile-12 – Tyr-8 Leu-13 – Pro-9 Thr-18 – Leu-14
17	Thr-18 – Leu-14 Leu-20 – Val-16 Phe-22 – Thr-18 Thr-24 – Ala-21	Ser-15 – Phe-11 Leu-13 – Pro-9 Leu-20 – Val-16 Phe-22 – Thr-18 Thr-18 – Leu-14 Thr-24 – Ala-21	Ile-12 – Tyr-8 Leu-13 – Pro-9 Thr-18 – Leu-14 Ser-15 – Phe-11 Leu-20 – Val-16 Phe-22 – Thr-18 Thr-24 – Ala-21
27	Arg-30 – Glu-26 Ala-32 – Leu-28 Asp-33 – Arg-29	Ala-32 – Leu-28	Asp-33 – Arg-29
31	Arg-30 – Glu-26 Ala-32 – Leu-28 Asp-33 – Arg-29 Leu-40 – Ile-36	Ala-32 – Leu-28 Leu-40 – Ile-36	Asp-33 – Arg-29 Leu-40 – Ile-36
87	Ser-86 – Phe-82 Phe-82 – Pro-78 Phe-88 – Leu-84 Ala-85 – Ala-81	Ser-86 – Phe-82 Phe-82 – Pro-78 Leu-84 – Phe-80 Ala-85 – Ala-81 Trp-96 – His-92 Ile-100 – Trp-96	Phe-82 – Pro-78 Ser-86 – Phe-82 Leu-84 – Phe-80 Ala-85 – Ala-81
134	Leu-135 – Leu-131 Asn-132 – Ile-128 Gln-136 – Asn-132 Tyr-143 – Leu-139 Ile-174 – Leu-170	Leu-133 – Leu-129 Leu-135 – Leu-131 Gln-136 – Asn-132 Asn-132 – Ile-128 Tyr-143 – Leu-139 Ile-174 – Leu-170	Leu-133 – Leu-129 Leu-135 – Leu-131 Asn-132 – Ile-128 Gln-136 – Asn-132 Tyr-143 – Leu-139 Leu-163 – Phe-159 Ala-167 – Leu-163
165	Leu-160 – Val-156 Val-165 – His-161 His-161 – Ser-157 Ser-162 – Val-158 Ala-167 – Leu-163 Ser-172 – Ile-168 Thr-275 – Ala-271 Met-41 – Val-37 Leu-44 – Leu-40 Leu-40 – Ile-36 Phe-48 – Leu-44	His-161 – Ser-157 Ala-167 – Leu-163 Ile-168 – Ala-164 Gly-171 – Ala-167 Ser-172 – Ile-168 Thr-275 – Ala-271 Ala-276 – Ile-272 Thr-274 – Leu-270 Met-41 – Val-37 Leu-44 – Leu-40 Leu-40 – Ile-36 Phe-48 – Leu-44	Leu-160 – Val-156 Ala-165 – His-161 His-161 – Ser-157 Ser-162 – Val-158 Ile-168 – Ala-164 Ala-167 – Leu-163 Gly-171 – Ala-167 Ser-172 – Ile-168 Met-41 – Val-37 Phe-45 – Met-41 Leu-44 – Leu-40 Phe-48 – Leu-44
188	Arg-187 – Aan-184 Leu-189 – Gln-185 Ala-190 – Phe-186 Arg-191 – Arg-187	Leu-180 – Leu-176 Leu-188 – Gln-185 Ser-193 – Glu-190	Leu-180 – Leu-176 Ser-193 – Glu-190