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The latter is defined as proinsulin C-peptide fragment 33-63 with the amino acid sequence EAEDLQVGQVELGGGPGAGSLQPLALEGSLQ [relative molecular mass ([M.
In conclusion, we developed an ID-LC/tandem MS procedure with sufficient LOD/LOQ and specificity for interference-free measurement of basal and stimulated serum concentrations of proinsulin C-peptide fragment 33-63.
Proinsulin C-peptide and its C-terminal pentapeptide: degradation in human serum and Schiff base formation with subsequent C[O.