RAPD patterns for 11 L. rhamnosus strains obtained with primers OPL-05 and PL1. Lanes: 1, L. rhamnosus CCUG 34682; 2, L. rhamnosus CCUG 21452; 3, L. rhamnosus CCUG 34425; 4, L. rhamnosus Lc 1/3; 5, L. rhamnosus Lc 705; 6, L. rhamnosus GG; 7, 1-kb DNA ladder (Gibco BRL); 8, L. rhamnosus E97800; 9, L. rhamnosus L13; 10, L. rhamnosus L17; 11, L. rhamnosus L20; 12, L. rhamnosus L32; 13, negative control (no bacterial DNA); 14, 1-kb DNA ladder. The arrow indicates the approximate position of the isolated strain-specific product from strain Lc 1/3 (lane 4).