masses 117, 130, and 131 Da. These fragments may be assigned to indole derivatives: ... peptides with an electric field F ) 0 V/m in the deflector and with F ) 1.5 * 107 V/m (25 kV ... ( 37 289 ( 37 375 ( 50 391 ( 77 Re 28.4 33.5 38.6 43.7 48.8 Rpd 212 167 271 289 365 ...

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