Fig. 3

The stability of the Delta-spike protein when treated with different compounds. Delta-spike expression following K (A) and M (B) compound series treatment of the cells (10 μM) as analyzed using the Western blot method. Expression levels of the spike protein after the cells were treated with compounds (10 μM) of K (C) and M (D) series as determined using whole-cell lysates. Values indicate means ± SEM. (n = 3, *** p < 0.001, **** < 0.0001 vs. control group)