Dunham P B
Biochim Biophys Acta. 1976 Aug 16;443(2):219-26. doi: 10.1016/0005-2736(76)90505-8.
Isoimmune sheep anti-L serum was fractionated, yielding two antibodies with different specificities of action on potassium transport in LK red cells of sheep and goats: anti-Lp, which stimulates active transport, and anti-L1, which inhibits passive transport.