Table 1. Overview of protein detection for some of the abundant bacterial taxonomic groups.

	C. proteolyticus	C. thermocellum and Ruminoccaceae	Caldicellulosiruptor species	Gelria	Tta-b61
% in sample from microcosm A, day 60a	43–65	1–2	10–16	20–25	7–12
Closest fully sequenced microbial genome(s) (number of putative proteins encoded in the genomes)	C. proteolyticus (1482)	C. thermocellum (2911–3173)	Caldicellulosiruptor species (2147–2682)	Natranaerobius thermophilus, Desulfotomaculum kuznetsovii, Pelotomaculum thermopropionicum (2882, 3398, 2919)	Thermoanaerobacter pseudethanolicus (2239)
% 16S IDb	97–100	87–100	95–97	88	88
% NAIc	60–100	43–100	50–60	45	45
% AAId	95–100	52–100	70–100	53	53
Protein identification probabilitye	0.62–1.00	0.02–1.00	0.21–1.00	0.02	0.02
% of the total number (514) of identified non-redundant proteins	20% (104 proteins)	16% (82 proteins)	37% (192 proteins)	3% (13 proteins)	1% (6 proteins)

^aRough estimate based on the 16S rRNA gene pyrosequencing data values from the bacterial primer set ±20%, and neglecting the archaeal population.

^bPercentage of sequence identity between the sample-related sequences and the 16S rRNA gene sequences from the most closely related fully sequenced microbial genome represented in UniprotKB.

^cNucleic acid identity. Estimation based on Zaneveld et al. (2010).

^dAmino acid identity. Estimation based on Konstantinidis and Tiedje (2007).

^eEstimation based on Denef et al. (2007).