Figure 4: Metylation of NS1 can not be reversed by LSD1.
From: Structural basis for histone mimicry and hijacking of host proteins by influenza virus protein NS1

Mass spectrometry results of H3K4 (a) or NS1 (b) peptides after incubation with buffer or purified LSD1 protein. The m/z signals for the +4-charged peptides are shown.