Table 3.

Assignment of absorbance bands for dry bacterial cells from the literature.

Wavenumber (cm−1)	Assignment	Possible Biomolecule Contribution	Reference
2957	ν(CH3) asymmetric	Fatty acids	[17]
2919	ν(CH2) asymmetric	Fatty acids	[17]
2872	ν(CH3) symmetric	Fatty acids	[9]
2852	ν(CH2) symmetric	Fatty acids	[9]
1741	v(C=O)	Lipid esters	[9]
~1655	Amide I	Proteins	[9]
1548	Amide II	Proteins	[9]
1457	$\mathsf{\delta }$(CH2)	Lipids, proteins	[17]
1240	ν(P=O) asymmetric	Phospholipids	[18]
~1160	$\mathsf{\delta }$(COP), $\mathsf{\delta }$(COH), ν(C–C)	DNA and RNA backbones	[9]
1200–1000	ν(P=O) symmetric, ν(COC)	Polysaccharide, DNA and RNA, phospholipids	[18]

ν: Stretch; $\mathsf{\delta }$: deformation