SDS-PAGE analysis of LmChiA (A) and LmChiB (B) during purification steps. Lane 1, protein marker (Chromatin Prestained Protein Ladder, Vivantis, Malaysia); lane 2, crude cell extract; lane 3–4, washing fractions after using Ni sepharose column; lane 5, purified LmChiA and LmChiB. The numbers in the margin indicate the molecular weights (kDa) of the proteins in the protein marker. A full, unmodified version of this figure is available as Supplementary File 1.