Cross-linker

 Finds all possible cross links, digests the proteins, and lists the monoisotopic mass of each cross-linked peptide. For within-protein crosslinks or crosslinking for homomers, just use one protein. Help
Enter your sequences below (copy and paste or use our examples):
Protein 1:

N terminal group:   C terminal group:

Protein 2:

N terminal group:   C terminal group:

Digest with protease: and maximum missed cleavages.

Peptide Modifications: Help
Cysteine modification(all C's):   Oxidized Methionine (all M's)
One Post-translational modification:

Charge State: [M+]

Cross-linker: Help     
Difference Formula: C H N O S Change in mass:
Cross-linked amino acids: (comma delimited)
   No protease cut for crosslinked amino acid.
   Between protein 1 and 2 only.

Target ion m/z: with a maximum of Da. Help

Results
The proteolytic peptides close to your target m/z:
{ } is the starting sequence number of a peptide from protein 1.
[ ] is the starting sequence number of a peptide from protein 2. = represents the crosslinker.

Isotope Cluster Help
Select a result, above, to find the Formula:  

Substitutions: (when you show isotope cluster) Help
Amino Acid: has atoms substituted by with composition of %

References
Colby College and Los Alamos National Laboratory, T. W. Shattuck, 5/3/01