sentence: Purified hVDAC3 sample was reconstituted into PLM composed of a DOPC / DOPE / DOPG ( 1:1:2 wt / wt ; DOPC / DOPE / 2DOPG ) lipid mixture , which mimics the high content of PC and PE lipids and preserves the negatively charged DOPG anionic lipids of the MOM ( de Kroon et al ., 1997 ) .