Alignment of the deduced amino acid sequences of MaPMEI (ABC41689) with other reported PMEIs and invertase inhibitors. PMEIs from M. acuminata (ABC41689), T. aestivum (ACI01434), B. oleracea (AAZ20131), A. deliciosa (BAC54965) and invertase inhibitors from Z. mays (NP001151081), N. tabacum (AAN60076), S. tuberosum (ACO35698), I. batatas (spQ8LJU6), S. lycopersicum (spO82001) and A. thaliana (NP564516) were taken for alignment using ClustalW program. Universally conserved Cys residues within the members of PME/Invertase inhibitors are highlighted in grey. Region from residue 1 up to black arrow shows putative signal peptide