Major fingerprints of PLFA and quinone as a marker for different bacterial groups in this study.

In this study, we refer to the different quinones with the following abbreviations: ubiquinone - UQ-n; and menaquinone - MK-n. The number (n) indicates that of the isoprene unit in the side chain of the quinone. Partially hydrogenated MKs were expressed as MK-n(Hx), where x indicates the number of hydrogen atoms saturating the side chain.
aPLFA data were modified mainly from [23], [26], [90], [91].
bQuinone data were modified mainly from [56], [92]–[94].
cSaturated fatty acids.
d+, 1–5%; ++, 5–15%; +++, 15–40%; ++++, >40% of total PLFA pool or total quinone pool; *, present in few species; G, a maker found in a broad range of bacteria and algae, and M, a marker can be used specifically as an indicator for specific bacterial group with the phylum.