Figure 3.
Xylanase identification and purification. (A) LB plate containing insoluble AZCL-xylan. The positive stamped clone is indicated by a red arrow. (B) SDS-PAGE analysis of recombinant xylanase XynA3 purified from E. coli (pET21a-xynA3). Lane 1, crude extract; lane 2, crude extract induced with IPTG; lane 3, after Ni-NTA affinity chromatography; lane 4, after ion exchange chromatography; M, NZYcolour Protein Marker II (NZYTech).