The invention herein is directed to methods using Procion dyes to perform separations of interest in manipulating the NAD.sup.+ -independent ribotoxins. The methods are useful for preparing therapeutic agents containing these ribotoxins or their A polypeptide components. This separation method has been...http://www.google.fr/patents/US4962189?utm_source=gb-gplus-shareBrevet US4962189 - Ribotoxin conjugates
