title: 16S amplicon of model community: model community cultivated on agar plates, replicate 2
design: artificial bacterial community spread on agar plates, plates incubated for 1 month, biomass washed of 15 plates and pooled, mechanical cell lysis by bead beating, phenol DNA extraction, DNA precipitation with ethanol, Q-Sepharose purification for removal of humic acids, PCR of V3-V4 region with 314F and 758R primers, amplicon purification and quantification, pooling, further library prep as in standard illumina instructions