and absorbance was read at 540 nm using a microplate reader (BioTek Instruments, Winooski, VT, USA) controlled by the Gene 5TM software version 1.1. (BioTek Instruments).
andabsorbance was read at 540 nm using a microplate reader (BioTekInstruments, Winooski, VT, USA) controlled by the Gene 5TM softwareversion 1.1. (BioTek Instruments).