Figure 2. Simultaneous saccharification and fermentation of different cellulosic sources by a recombinant Saccharomyces cerevisiae harbouring Humicola grisea bgl4 gene for second generation ethanol production in shaken flasks. PH: prehydrolysis; CMC: carboxymethycellulose; AVICEL: crystalline cellulose and SCBPCL: sugar cane bagasse pre-treated cellulignin.