Fractionation of Gelatins using Amberlite CG-50 Resin.

Abstract
By means of an Amberlite CG-50 resin column, it is possible to separate gelatins into a continuous series of arbitrary fractions by eluting with buffers of increasing pH. The distribution pattern of acid (lime-treated) gelatins was found to occur at a lower pH range than that of neutral gelatins. The fractions which emerged first had a slightly lower molecular weight. It is suggested that the more acid and more degraded fractions arise from the surfaces of the fibres.