Description
Microbial fermentation enhances umami by enzymatically liberating free glutamate and nucleotides from protein substrates.
Technical
Proteolytic enzymes such as peptidases and aminopeptidases break down proteins into peptides and free amino acids, notably glutamate, which imparts umami. Concurrently, nucleoside monophosphates like IMP and GMP are released, synergistically amplifying the umami perception. The process is temperature and time dependent, with optimal ranges of 20–35 °C and 3–14 days to maximize flavor while preventing spoilage.
Science
Primary Reaction
Proteolysis and nucleotide hydrolysis releasing free glutamate and nucleotides
Sensory Profile
Aroma ()
earthynuttysavoryfermentedumamibrothyyeastycomplexrichdeep