protein, C-terminal residue modification mass

# protein, C-terminal residue modification mass ## Syntax This value is a floating point number represented by a character string. ## Notes Positive and negative values are allowed. If this value is not present, the default value is 0.0. ## Description This value represents any additional fixed modification mass added only to the C-terminal residue in an intact protein, in Daltons. see also: protein, cleavage C-terminal mass change | protein, cleavage N-terminal mass change | protein, N-terminal residue modification mass X! TANDEM API description project