Fig. 4From: Simplified cloning and isolation of peptides from “sandwiched” SUMO-peptide-intein fusion proteinsIsolation and purification of LcnA as a SPI fusion protein. (A) MALDI-TOF MS of SUMO-LcnA after intein cleavage. (b) MALDI-TOF MS of LcnA after SUMO cleavage. The inlaid purple box shows an expansion of the LcnA mass peakBack to article page