Preservation of bacterial L-forms by freezing.
D001419:Bacteria; D001431:Bacteriological Techniques; D004926:Escherichia coli; D005615:Freezing; D007740:L Forms; D011309:Preservation, Biological / Q000379:methods*; D013211:Staphylococcus aureus; D013297:Streptococcus pyogenes