TABLE 1.

Sequence alignment of the AT₁ receptor, CXCR4 receptor, κ-opioid receptor, and nociceptin/orphanin FQ receptor

Sequence alignment was performed by the I-TASSER server. Residues in red represent the most conserved residues within each transmembrane domain. Residues in blue represent other important residues discussed in the text. Numbers represent the Ballestcros numbering of the residue aligned under the last number. Sequences for the CXCR4, κ-opioid receptor (KOR), and nociceptin/orphanin FQ (N/OFQ) receptors are truncated and represent the actual sequences found in the crystal structures of those receptors.