Characterization of lactic acid bacteria by FTIR and other analytical approaches to identify markers of cryoresistance

This data set concerns the biochemical and biophysical characterization of three lactic acid bacteria exhibiting different resistance to freezing to identify markers of cryoresistance. Carnobacterium maltaromaticum CNCM I-3298 (most freeze-resistant), Lactobacillus delbrueckii ssp bulgaricus ATCC 11842 and Lactobacillus delbrueckii ssp bulgaricus CFL1 (most freeze-sensitive) were investigated. The dataset includes for each of the three strains: i) biological activity (culturability and acidifying activity) and ii) biochemical composition by Fourier transform infrared microscopy of cells in an aqueous environment before and after freeze-thawing; iii) membrane characterization: fatty acid composition, membrane fluidity following cooling, lipid phase transition following freezing and iv)intracellular glass transition temperature