Adaptation, Physiological Biofilms Cations Cell Wall Culture Media Gene Expression Profiling Lactobacillus casei Lipopolysaccharides Osmotic Pressure Protein Binding Teichoic Acids adaptation article bacterial cell wall bacterial enzyme bacterial growth binding affinity biofilm cation cloning controlled study dextro alanine enzyme activity gene expression hydrolysis in vitro study lipoteichoic acid messenger RNA nonhuman operon