QRPR and HCQRPQ, Two Peptides from Soybean, have an Inhibitory Effect on the Proliferation of HepG2 Cells.

Background: There are few studies on the inhibition effects of soy peptides on hepatocarcinoma cells. Further insight into the underlying relationship of soybean peptides and hepatocarcinoma needs to be addressed. Therefore, it is worthwhile investigating the possible mechanisms of soybean peptides, especially the hepatocarcinoma effects.

Antibacterial activity and mode of action of ε-polylysine against O157:H7.

Gram-negative O157:H7 were chosen as model bacteria to evaluate the antimicrobial mechanism of ε-polylysine (ε-PL). The antibacterial activity of ε-PL was detected by measuring the minimum inhibitory concentration values as well as the time-kill curve. The membrane integrity was determined by ultraviolet (UV) absorption, membrane potential (MP) assay and flow cytometry (FCM) experiments.