Compairison of the integrative conjugative elements. Amino acid matches from the six-frame translations (TBLASTX) of integrative conjugative elements of S. aureus S0385 (ICESa2 and ICESa1), B. subtilis (ICEBs1) [GenBank: AL009126 ] and L. monocytogenes (ICELm1) [GenBank: AARQ] dislayed using ACT http://www.sanger.ac.uk/software/ACT. ORFs are represented by coloured boxes. The red bars indicate TBLASTX matches between the elements. There are six proteins that are conserved among all ICEs (SAPIG0075, 0076, 0077 and 0079-0081), which include the FtsK/spoIII and replication initiation proteins.