design: Amplicon sequencing of EXT-DNA-MD025-US1-71-A. Sequencing was performed as described in https://doi.org/10.3389/fmicb.2021.669776. {primers: GTGYCAGCMGCCGCGGTAA + GGACTACNVGGGTWTCTAAT, nucleic acid: DNA, flow cell identifier: K9MT9, barcoding: UDB-H12, plate-position: 4 A3, barcodes: ACTGGCAAACCT + ACTGGATCTCGC}.