TABLE 3.

Estimates of the δ¹³C values (‰) of proteins for the microbial groups from MIS mat sample LH47, as calculated from P-SIF data, using two different subsets of phylogenetic groups

Microbial group (LH47 only)	Weighted linear regression	Unweighted linear regression
Proteobacteria grouped by Phylum
Cyanobacteria	−24.3 ± 0.4	−25.0 ± 1.2
Proteobacteria	−24.4 ± 0.3	−24.4 ± 0.6
Other	−23.2 ± 0.4	−24.2 ± 0.8
Proteobacteria Grouped by Class
Cyanobacteria	−24.0 ± 0.4	−24.4 ± 1.1
Gammaproteobacteria	−26.2 ± 1.3	−27.5 ± 1.7
Deltaproteobacteria	−23.3 ± 0.6	−23.6 ± 0.8
Other	−24.0 ± 0.3	−24.1 ± 0.6