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. 1999 Feb 1;189(3):461–470. doi: 10.1084/jem.189.3.461

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Mass spectrometry of scTCR CDR mutants. Purified wild-type (WT) and mutant TCR proteins were dialyzed into 30% acetonitrile, 0.1% formic acid and subjected to mass spectrometry. Sensitivity of measurement was generally ±4 daltons (i.e., 0.01%). Observed mass differences attributable to the amino acid substitutions are shown. Expected mass differences (in daltons) were as follows: S51P, +10; S27A, −16; S27F, +60.