To generate a new AMT database in the MS Access format (.mdf file) from a given User context, follow these steps:

• Select the User context you want to export
• Select MS Identifications > Context > Export > Create AMT database from the main menu bar.
• Browse to a folder where you want to save the AMT database file and click Open.
• A confirmation dialog will indicate when saving process is finished.
  

Note : Before generating a new AMT db from a context, protein grouping should have been executed !

Below is the actual AMT database model showing relationships between tables in MS Access.

When exporting an AMT database from hEIDI, only the 5 following tables AMT, AMT_Proteins and AMT_to_Protein_Map, protein_group, protein_to_protein_group_map are populated.

• Table AMT (contains all the peptides of the context)
• Table AMT_Proteins (contains all the proteins of the exported context)
  • Protein_ID: protein identifier
  • Protein_name: protein accession

• Table AMT to Protein Map (links the two previous tables to indicate by which peptides proteins are identified)

• Table protein_to_protein_group_map
  • protein_id: protein identifier
  • protein_group_id: protein group identifier
  • nb_amt_match: # of peptides that match on this protein in this protein group

• Table protein_group
  • protein_group_id: protein group identifier
  • master_id: master protein identifier
  • protein_accession: master protein accession
  • score: master protein score
  • nb_amt_match: # of peptides that match on master protein
  • msidb_pg_id: protein group identifier in MSIdb (protein_group table)

• Table identification
  • identification_name: names of identifications included in the exported context

• Table build
• date: AMTdb creation date
• msidb_name: MSIdb name
• context_name: name of the exported context
• context_is_saved: is the exported context has been saved to MSIdb ?
• msidb_context_id: context identifier in the MSIdb (look at this field only if the context has been saved to MSIdb)