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ETA variants used in this study. Shown are the amino acid sequences of the WT and mutant ETA CTEs. The numbers above indicate the amino acid positions in the receptor protein. Palmitoylation occurs at cysteine residues indicated in black (14). Phosphorylated amino acids in ETA-WT (14) are underlined; mutant amino acids are highlighted in boldface. Additional substitutions of ETA-14PD (S289A, S295A, and S382A) located upstream of the palmitoylation site are not shown.
