Averaged rmsds (Å) of the 7TM bundle pairs in the inactive state for class A GPCRs of known structure.

Amino acid sequence identity (%) is also shown in parenthesis. The range of each helix contained in a 200 residue 7TM bundle with Ballesteros & Weinstein numbering is as follows: helix I, 1.35–1.59 (25 a.a.); helix II, 2.38–2.67 (30 a.a.); helix III, 3.22–3.55 (34 a.a.); helix IV, 4.39–4.63 (25 a.a.); helix V, 5.36–5.65 (30 a.a.); helix VI, 6.29–6.60 (32 a.a.); helix VII, 7.32–7.55 (24 a.a.). brh and srh stand for bovine rhodopsin and squid rhodopsin, respectively.氨基酸序列一致性（%）亦以括号标注。采用Ballesteros & Weinstein编号法（Ballesteros & Weinstein numbering）的200残基七跨膜螺旋束中所包含的各螺旋的范围如下：螺旋I：1.35–1.59（25个氨基酸残基）；螺旋II：2.38–2.67（30个氨基酸残基）；螺旋III：3.22–3.55（34个氨基酸残基）；螺旋IV：4.39–4.63（25个氨基酸残基）；螺旋V：5.36–5.65（30个氨基酸残基）；螺旋VI：6.29–6.60（32个氨基酸残基）；螺旋VII：7.32–7.55（24个氨基酸残基）。brh与srh分别代表牛视紫红质（bovine rhodopsin）与鱿鱼视紫红质（squid rhodopsin）。