Abstract
Lipids are an integral component of the bacterial membrane and show great structural diversity within the cell. While lipid composition has been an important signature of bacterial phylogeny for many decades, it also has the potential to provide information on the resources and procedures used to culture an organism. Chemical factors like nutritional substrates, temperature, and physical dynamics during growth all can influence the types of lipids and their relative ratios inside the cell and potentially leave diagnostic biosignatures that are unique to a specific production process.
In this chapter, we examine the structural diversity of lipids in the cell and the factors that affect lipid composition during laboratory culturing with particular emphasis on Bacillus organisms. Methods used to extract, separate, and detect fatty acids are reviewed. In addition, the potential utility of lipid profiles in forensic investigations is discussed in the context of specific examples from the literature. Lastly, validation considerations and quality assurance are highlighted as important aspects in the implementation of lipid analysis for microbial forensics.
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Robertson, J.M., Ehrhardt, C.J., Bannan, J. (2012). Fatty Acids and Lipids. In: Cliff, J., Kreuzer, H., Ehrhardt, C., Wunschel, D. (eds) Chemical and Physical Signatures for Microbial Forensics. Infectious Disease. Springer, New York, NY. https://doi.org/10.1007/978-1-60327-219-3_3
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