Fig. 4
![Fig. 4](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs43141-021-00203-5/MediaObjects/43141_2021_203_Fig4_HTML.png)
Cytotoxic effect and variation in morphological characteristics of human colon carcinoma cell line (HCT-116), hepatocellular carcinoma cell line (Hep-G2), breast cancer cell line (MCF-7), and normal human lung fibroblast cells (Wi-38) treated with different concentrations (15.62–500 μg/mL) of Streptomyces sp. NMF6 extract compared with untreated cell lines (control)