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Cocoa beans fermentation is a spontaneous process of post-harvest very important for the development of chocolate aroma and flavor, which involves a number of complex microbial activities. In this work, we identify the microorganisms present in cocoa beans before, during and after the fermentation process, applying DNA sequencing analysis and MALDI TOF / TOF mass spectrometry. With the first method, the predominant bacteria and yeast identified were Lactobacillus plantarum (29%), L. brevis (18%), Bacillus cereus (15%), Pediococcus acidilactici (12%), and Pichia kudriavzevii (100%). The most important peptide sequences of each identified strain by mass fingerprint were characterized too. By the second method, 51 species of microorganisms being 73.7% bacterial species and 26.3% yeast species were identified. Additionally peptide sequences responsible Vicilin protein characteristic aroma of the fermented cocoa beans and the albumin protein of 21KDa were detected.

Caracterización molecular de los microorganismos presentes durante el proceso fermentativo de los granos de cacao (Theobroma cacao)