ence of more than one enzyme in a given tissue are not general, however; PAL from lightand
dark-grown buckwheat plants,27 mustard plants,22 and GIycine mux tissue cultures28
have been examined by electrophoresis and found to be the same. Similarly, the PAL in
preparations from light- and dark-aged potato disks is not separable by gel filtration
(Sephadex G200).2g
TAL activity cannot be demonstrated in many PAL preparations and often the activity