Ricin Enzymatic Action The ricin A portion of the heterodimer is the enzyme that binds and depurinates a specific adenine of the 28S rRNA. The adenine ring of the ribosome becomes sandwiched between two tyrosine rings in the catalytic cleft of the enzyme and is hydrolyzed by the enzyme s N-glycosidase action.
Bread stays fresh in a fridge for approximately 2 days. If the bread is not cooked and is still dough, it can stay fresh for up to a month.
I would say that bread stays fresh in the fridge for about a week. If you are unable to eat alot of bread at one time,then it is best to store your bread in the freezer,because the freezer keeps your bread for a longer period of time than the fridge does! ;-) Source(s): Nurse and Mother. Winnie Â· 9 years ago.