EBI category to contain details of an alignment between a sequence in a PDB entry and a sequence database. EBI Item. The accession code. For SwissProt cross-references this should be the data of the form P01234 or Q01234 EBI Item. The name of the DB. For SwissProt cross-references this should be SWS EBI Item. The asym id for this alignment EBI Item. Loop counter for the alignment. This allows more than one alignment against a chain where necessary EBI Item. Entry Id