Fast and slow milk-coagulating variants of Lactobacillus helveticus HLM 1.
Slow milk-coagulating variants were isolated from Lactobacillus helveticus HLM 1, a fast strain which coagulates milk in 16 h at 42 degrees C. Variants were isolated after subculturing in reconstituted skim milk or complex broth media. Analysis of plasmid content revealed that in slow variants a 3.5-megadalton plasmid was missing.
D000818:Animals; D014644:Genetic Variation; D007778:Lactobacillus / Q000145:classification* / Q000235:genetics; D008892:Milk; D010957:Plasmids