where Y is the EUC of the mixture in terms of g MSG/100 g; ai is the
concentration (g per 100 g) of each umami amino acid; aj is the concentration
(g per 100 g) of each umami 50-nucleotide [50-inosine
monophosphate (50-IMP) or 50-guanosine monophosphate (50-
GMP)]; bi is the relative umami concentration (RUC) for each umami
amino acid to MSG (Glu, 1 and Asp, 0.077); bj is the RUC for each
umami 50-nucleotide to 50-IMP (50-IMP, 1 and 50-GMP, 2.3); 1218
is a synergistic constant, based on the concentration of g per
100 g used.n