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A culture of CeZfuZomon~ sp. and Bacillus subZJ.$~ was grown using sugar cane bagasse pith from unburnt sugar cane (UCP) as the source of carbohydrates. The yield and production values were proved to be higher than those obtained with burnt sugar cane (BCP).For UCP the maximum protein production was 7.8 g/l, the cellulolytic activity being 70 %, with a protein/hydrolyzed pith yield of 22 %. For BCP, the maximum protein value was 4.6 g/l, with a cellulolytic activity of 55 % and a protein/hydrolyzed pith of 17 %.The possibility of a chemical inhibitor being present in BCP is discarded because of the alkaline pretreatment and the results obtained on treating the pith from burnt cane with a benzene-ethanol (2:1) mixture. These results were the same as the ones obtained without the benzene-ethyl alcohol mixture extraction.