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. 2021 Aug 9;21:49. doi: 10.1186/s12896-021-00708-4

Fig. 4.

Fig. 4

SDS-PAGE analysis of NK-Bs secreted into the supernatant during high-density fermentation. M: protein molecular weight marker (the molecular weight of each band is indicated on the left); lanes 1–9: cell culture supernatant after induction with 1% methanol for 12, 24, 36, 48, 60, 72, 84, 96, and 108 h, respectively