First, that rennin action consists of the hydrolytic splitting of
the casein molecule into two similar molecules of paracasein; perhaps
in somewhat the same manner that maltose is split into two
molecules of dextrose.
Second, that, as a consequence of this cleavage it would seem
to be doubtful if Hammarsten’s whey-protein could be one of the
products of rennin action.
Third, that rennin is not, strictly speaking, a coagulating ferment,
the coagulation of paracasein being due to the fact that
calcium paracaseinates are less soluble than the calcium caseinates,
especially in the presence of soluble salts of calcium, barium or
strontium.