“…The presence of three plasmids (22.0, 6.0 and 3.5 kb), already described in strain CRL 974, was that the proteolytic activity in these thermophilic confirmed (Pridmore et al, 1994) tures. In addition, these strains proved to be insensistrains, but showed D(2)-lactate dehydrogenase ac-tive to the attack by selected phages, which have tivity instead of lactic acid racemase.…”