Table 3.

Theoretical and Experimentally Determined Masses of Peptides of Trocarin

Molecular Mass
Calculated3-151Observed3-152
Light chain  
 Lys C peptides  
 Lc1-21 2,861.90  2,861.53 ± 0.56  
 Lc22-36  2,138.10 2,137.58 ± 0.33  
 Lc37-62* 3,340.64 3,664.06 ± 0.57  
 Lc63-79  2,031.25 2,031.84 ± 0.67  
 Lc80-83  597.68  597.6  
 Lc84-101  2,487.87  2,488.38 ± 0.42  
 Lc102-137 4,313.80  4,314.93 ± 0.40  
 Glu C peptides  
 Lc1-38 5,194.96  5,193.25 ± 1.36  
 Lc39-77* 5,259.54 5,262.27 ± 1.92  
 Lc78-82  654.59  653.60 
 Lc83-106  3,215.26  3,215.27 ± 0.60  
 Lc128-141 1,670.76  1,670.82 ± 0.25  
 
Heavy chain  
 Lys C peptides  
 Hc137-144  887.97  888.50 ± 0.96 
 Hc145-212  7,946.94  7,948.50 ± 1.29  
 Glu C peptides  
 Hc1-21  2,542.98  2,542.80 ± 0.33 
 Hc53-102  6,125.95  6,125.64 ± 0.51  
 Hc112-122 1,194.36  1,194.01 ± 0.28  
 Hc196-207  1,360.50 1,360.08 ± 0.25  
 Hc208-235  3,336.09 3,336.49 ± 0.27  
 Asp N peptides  
 Hc81-85  622.68 622.50  
 Hc88-111  2,833.37  2,833.38 ± 0.24 
 Hc112-122  1,194.36  1,194.01 ± 0.28  
 Hc123-160 4,288.92  4,288.20 ± 0.86  
 Hc161-173  1,670.91 1,670.88 ± 0.43  
 Hc174-178  572.61  572.50 
 Hc179-194  1,752.89  1,753.32 ± 0.28  
 Hc103-117 1,665.85  1,665.77 ± 0.94  
 Hc195-235  4,793.66 4,793.01 ± 0.20  
 CNBr peptides3-153 
 Hc95-120 2,892.26  2,892.63 ± 0.02  
 Hc121-157  4,209.77 4,209.44 ± 0.24  
 Hc169-232  7,353.33 7,353.48 ± 0.62 
Molecular Mass
Calculated3-151Observed3-152
Light chain  
 Lys C peptides  
 Lc1-21 2,861.90  2,861.53 ± 0.56  
 Lc22-36  2,138.10 2,137.58 ± 0.33  
 Lc37-62* 3,340.64 3,664.06 ± 0.57  
 Lc63-79  2,031.25 2,031.84 ± 0.67  
 Lc80-83  597.68  597.6  
 Lc84-101  2,487.87  2,488.38 ± 0.42  
 Lc102-137 4,313.80  4,314.93 ± 0.40  
 Glu C peptides  
 Lc1-38 5,194.96  5,193.25 ± 1.36  
 Lc39-77* 5,259.54 5,262.27 ± 1.92  
 Lc78-82  654.59  653.60 
 Lc83-106  3,215.26  3,215.27 ± 0.60  
 Lc128-141 1,670.76  1,670.82 ± 0.25  
 
Heavy chain  
 Lys C peptides  
 Hc137-144  887.97  888.50 ± 0.96 
 Hc145-212  7,946.94  7,948.50 ± 1.29  
 Glu C peptides  
 Hc1-21  2,542.98  2,542.80 ± 0.33 
 Hc53-102  6,125.95  6,125.64 ± 0.51  
 Hc112-122 1,194.36  1,194.01 ± 0.28  
 Hc196-207  1,360.50 1,360.08 ± 0.25  
 Hc208-235  3,336.09 3,336.49 ± 0.27  
 Asp N peptides  
 Hc81-85  622.68 622.50  
 Hc88-111  2,833.37  2,833.38 ± 0.24 
 Hc112-122  1,194.36  1,194.01 ± 0.28  
 Hc123-160 4,288.92  4,288.20 ± 0.86  
 Hc161-173  1,670.91 1,670.88 ± 0.43  
 Hc174-178  572.61  572.50 
 Hc179-194  1,752.89  1,753.32 ± 0.28  
 Hc103-117 1,665.85  1,665.77 ± 0.94  
 Hc195-235  4,793.66 4,793.01 ± 0.20  
 CNBr peptides3-153 
 Hc95-120 2,892.26  2,892.63 ± 0.02  
 Hc121-157  4,209.77 4,209.44 ± 0.24  
 Hc169-232  7,353.33 7,353.48 ± 0.62 

Glycopeptides. Calculated mass of Lc39-77 includes carbohydrate mass (335.12).

F3-151

Masses calculated from their sequences. Cysteines were pyridylethylated.

F3-152

Masses were determined by electrospray ionization mass spectrometry.

F3-153

Met residues converted to homoserine lactone by CNBr treatment.

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