Mass isotopomer distribution of TBDMS-derivatized protein-bound amino acids (corrected) The symbols of fragments denote the cracking patterns of TBDMS-derivatized amino acids: (M-15) <sup>+</sup>, (M-57) <sup>+</sup>, (M-85) <sup>+</sup>, (M-159) <sup>+</sup>, f302, and side chain (sc) fragments.

<p>Mass isotopomer distribution of TBDMS-derivatized protein-bound amino acids (corrected) The symbols of fragments denote the cracking patterns of TBDMS-derivatized amino acids: (M-15) <sup>+</sup>, (M-57) <sup>+</sup>, (M-85) <sup>+</sup>, (M-159) <sup>+</sup>, f302, and side chain (sc) fragments.</p>