Receptor: A user can type a query for which he wants to get the information. To make his query specific and precise a user can select the field on which the query shall be performed. The default selection is "All", which means if no option is selected the query will be looked upon in all fields of the database. A user can restrict the fields to be displayed in result. All checked fields are displayed in the result. If user did not select any check box then only the Swiss-Prot id of the entries will be displayed. All the publication references are hyperlinked to Pubmed. The result screen will show "No record found under specified condition" when no relevant data is found in the database.

Ligand: A user can type a query for which he wants to get the information. To make his query specific and precise a user can select the field on which the query shall be performed. The default selection is "All", which means if no option is selected the query will be looked upon in all fields of the database. A user can restrict the fields to be displayed in result. All checked fields are displayed in the result. If user did not select any check box then only the entry No. and the query will be displayed. All the publication references are hyperlinked to Pubmed. The result screen will show "No record found under specified condition" when no relevant data is found in the database.

Browse_receptor: All the receptor in the database belong to the following classes of receptors:

• Toll-like receptor
• Mannose receptor
• Scavenger receptor
• NODs
• C-type lectin like family domain receptors
• PGRPs

So if a user wants to retrieve the information about all the memebers of a class of receptors, he can choose the relevant option from the option box. A user can restrict the fields to be displayed in result. All checked fields are displayed in the result. If user did not select any check box then only the entry No. and the query will be displayed. All the publication references are hyperlinked to Pubmed. The result screen will show "No record found under specified condition" when no relevant data is found in the database.

Browse Ligand: For convenience all the ligands in the database are classified into following types depending upon their chemical composition:

• Nucleic acid
• Protein
• carbohydrate
• Peptide
• Lipopolysachharide
• Peptidoglycan
• Glycolipid
• Glycoprotein
• others

So if a user wants to retrieve the information about all the memebers of a class of receptors, he can choose the relevant option from the option box. A user can restrict the fields to be displayed in result. All checked fields are displayed in the result. If user did not select any check box then only the entry No. and the query will be displayed. All the publication references are hyperlinked to Pubmed. The result screen will show "No record found under specified condition" when no relevant data is found in the database.

Similarity search using BLAST against PRRDB
This option allows users to search sequnces similar to their query protein against a database of PRR sequences maintained at PRRDB.