Yellow and black soybean seeds (100 g) were cleaned and soaked
in distilled water (200 mL) for 16 h. After decanting the water,
an equal volume of distilled water was added and cooked in
pressure cooker until first whistle, followed by cooking at low
flame for 75 min.Thereafter, cooking water was drained off and
soybean seeds were dehulled for better fermentation. Cooked
and dehulled soybean was used for SSF and samples collected
from each step were dried in a hot air oven (OF22-G, Jeio
Tech, Daejeon, Korea) at 60 °C for further analysis.