sentence: Small but uncharged residues are allowed at position five ( Ala , Ser , Thr , Cys , Asn and Gly ) where serine is favoured , while the sole restriction at position six is that proline is not present ( PROSITE pattern PS00008 ) .40 To illuminate the character of the peptide binding surface in LdNMT , we superposed the binary complex of LdNMT with NHM onto the ternary complex of ScNMT with NHM and the octapeptide GLYASKLA ( Fig. 4d ) .