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. 2025 Jan 2;15:351. doi: 10.1038/s41598-024-82748-2

Fig. 3.

Fig. 3

DNA cloning, the purification of proteins, and the determination of pI. (A) Description of the upstream and downstream sequences of blaGOB-38 and the experimental steps for overexpression of the GOB-38 protein. (B) SDS-PAGE after the different purification steps. M, molecular mass standards; lane 1, crude extract from BL21-DE3; lane 2, Ni-NTA agarose resin eluent; lane 3, STarm Streptactin beads flow through liquid; lane 4, STarm Streptactin beads detergent; lane 5–7, STarm Streptactin beads eluent. (C) GOB-38 pI determination. Red arrow, standard; black arrow, sample.