Sulfidegenic Enrichments
Paired-end reads were merged using the software FLASH (2.2.00, Magoc and Salzberg, 2011). Briefly,the FLASH algorithm considers all possible overlaps at or above a minimum length between the readsin a pair and chooses the overlap that results in the lowest proportion of mismatched bases in the overlappedregion. FLASH computes a consensus sequence in the overlapped region by selecting at eachoverlapped position the base with the higher quality value. If both bases have an identical quality value,one is selected randomly. Pairs were merged with a minimum overlap size of 10bp to reduce falsepositivemerges.