TABLE 2.

Biological properties of SM1 euryarchaeal biofilm

Parameter	Description for SM1 euryarchaeal biofilm or value
Visual appearance	Milky, slimy, small drops
Harvesting	Harvesting was done by providing polyethylene nets as deep as possible in the sulfidic spring bore hole; attachment of visible, small biofilm drops was seen already after 10 min; quantitative harvesting after 4 days resulted in 1.5 to 2 g (wet weight)
Microbial composition	∼95% SM1 euryarchaea, ∼5% bacteria (mainly representatives of the δ-proteobacteria)
Structural features	Cells surrounded by filamentous hami and an additional, dense EPS; hami were degradable by proteinase K
EPS composition	Carbohydrates and proteins present at a ratio of 1:1.5
Water content	∼99.6%
pH	7-7.5
Genome size (SM1 biofilm cells)	∼3 Mbp
GC content (SM1 biofilm cells)	35.0 mol%