TABLE 2.

Biomarker PLFA content for sulfate-reducing bacterial isolates in published studies

Genus	na	Fatty acid abundanceb
		br17:1 (Desulfovibrio biomarker)	10me16:0 (Desulfobacter biomarker)	17:1 (Desulfobulbus biomarker)
Desulfovibrio	52	25 ± 13c	0 ± 0 [<1]	0 ± 1 [<4]
Desulfobacter	16	0 ± 1 [<2]	11 ± 6d	1 ± 3 [<11]
Desulfobulbus	6	0 ± 0 [ND]	0 ± 0 [ND]	44 ± 15
All others	26	4 ± 8 [<26]e	0 ± 2 [<8]f	2 ± 5 [<19]g

^aNumber of occurrences in the database. 

^bAverage ± standard deviation [< maximum value] mole percent of total PLFA. ND, not detected. 

^cFour isolates contained no detectable i17:1 isomers (48). 

^dOne Desulfobacter isolate contained no detectable 10me16:0 (8). 

^eDetected in six isolates assigned to other genera (Desulfomonas and Desulfomicrobium [48] and Desulfococcus, Desulfotomaculum, Desulfuromonas, and Desulfosarcina [28]; also detected in four unknown isolates [15, 16]). 

^fDetected in three isolates assigned to other genera (Desulfotomaculum and Geobacter [28] and Desulfobacterium [48]). 

^gDetected in nine isolates assigned to other genera (Desulfotomaculum [15], Desulfobacterium [48], Desulfomicrobium [48], Desulfuromonas [15, 48], Desulfomonas [48], Desulfotobacterium [28], Desulfococcus [28], and Desulfosarcina [28]); also detected in three unknown isolates (15, 16).