2.1. Yeast strain
Kluyveromyces marxianus strain from the collection of the Center of Biomass and Renewable Energy, Chemical
Engineering, Diponegoro University (Indonesia), was the yeast strain employed in the experiments. This strain was
supplied by Gadjah Mada University (Food and Nutrition Department), Indonesia. Cells of this yeast were
maintained at 4o
C on potato dextrose agar (PDA) sterilized plates