“Among various compounds tested thus far, methyl methanesulfonate, N-methyl-N'-nitro-N-nitrosoguanidine, L-ascorbic acid , sodium deoxycholate, p-tosyl-L-phenylalanine chloromethyl ketone, p-tosyl-L-lysine chloromethyl ketone, 3,3'-diaminobenzidine, and some of the metal salts stimulated the synthesis of p32 to varying extents.”