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. 2015 Nov 27;5:17341. doi: 10.1038/srep17341

Figure 1. Asp32 in TM1 of TAP1 is essential for tapasin binding.

Figure 1

(A) Predicted transmembrane helices of human TMD0TAP1 are illustrated (light blue). Substitutions of four consecutive residues with cysteine in the center of each TM are marked in red. (B) Interaction of the 16 single cysteine mutants with tapasin was probed by co-immunoprecipitation (IP). Representative blots are shown. Densitometric analysis of three independent experiments (mean ± standard error of the mean) of tapasin relative to TMD0TAP1 is summarized. Immunoblot signals were quantified by ImageJ (NIH). An isotypic antibody was used as control (mock). The input represents a 1/20 aliquot of the precipitate.