Representative AseI restriction patterns of distinct N. farcinica genotypes. Lanes: M, lambda DNA size markers; 1, D82 (type B); 2, D223 (type C); 3, D600 (type E); 4, D631 (type A); 5, D1132 (type G); 6, D1146 (type H); 7, D1148 (type I); 8, D1170 (type J); 9, D1174 (type K). Sizes are given in kilobase pairs.