Fill in the experimentally determined AA composition for the unknown protein. You may give a name to your protein, and also specify pI and Mw values.
The OS or OC (Organism Species or Organism Classification) field allows you to specify terms to limit the search to a range of organisms or to a specific organism (species). A Swiss-Prot / TrEMBL entry will only be returned, if all the given terms appear in either the OS or OC lines of that entry. If in doubt, please consult the Swiss-Prot list of species.
Scan in Swiss-Prot can be restricted by the use of a keyword. This should be a keyword in the Swiss-Prot KW lines. If in doubt, consult the Swiss-Prot list of keywords.
When searching in Swiss-Prot, AACompIdent removes signal sequences and / or propeptides (as documented in the Swiss-Prot feature table (FT lines)) before computing AA composition, pI and Mw for each of the resulting chains.
The annotation in TrEMBL is done automatically; it is incomplete and not always correct. Thus information on TrEMBL FT lines is not used to process TrEMBL proteins into mature chains or peptides (i.e. AA composition, pI and Mw are always computed for the whole sequence), and the use of a keyword is not allowed for searches in TrEMBL.
Additional options are available at the bottom of this page.
The results will be sent back by e-mail.