Mass Calculator

Sequences and Modifications

Input Directly into Text Box

Load FASTA and Modification File

 Calc as Partial Modifications

Intact Termini:

The Terminus parts can be specified in FASTA sequences. The priority is symbols in FASTA sequence > those in modification file (.mod) > those selected in the form.

Intact 5′ Term:           Intact 3′ Term:          

Enzyme:            Max Missed Cleavages:



Ion Activation Type:  

Number of Decimals:  

Isotope Set

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RIKEN Center for Sustainable Resource Science