Comet parameter: variable_mod05

Example:
variable_mod05 = 15.9949 M 0 3 -1 0
variable_mod05 = 79.966331 STY 0 3 -1 0
variable_mod05 = 42.010565 nK 0 3 -1 0     ... acetylation mod to lysine and N-terminus of all peptides
variable_mod05 = 15.994915 n 0 3 0 0     ... oxidation of protein's N-terminus
variable_mod05 = 28.0 c 0 3 8 1     ... modification applied to C-terminus as lon as the C-term residue is one of last 9 residues in protein
variable_mod05 = -17.02549 Q 0 1 0 0     ... protein N-terminal Q eliminating NH3 to form N-terminal pyrolidone carboxylic acid