Two Main Approaches—Thin Layer and Tube

Hitherto, gel electrofocusing has been carried out in thin layers and troughs, or else in narrow tubes. Very thin layers have been used by Awdeh et cU. (39), as well as by Catsimpoolas (28). Leaback and Rutter (37) used a special trough for casting slabs of polyacrylamide. The latter method permits a certain amount of preparative work. Riley and Coleman (30) also used thin layers. 

Wrigley (29) used small tubes on the lines of Davies equipment for disc electrophoresis (65). Dale and Latner (33) also used tubes which 

---