
The D6320 by Zymo Research is a ZymoBIOMICS Spike-in Control I for high microbial load samples, containing equal cell numbers of fully inactivated Imtechella halotolerans and Allobacillus halotolerans (<0.01% foreign DNA impurity) stored in DNA/RNA Shield at −80°C. Added before extraction, D6320 enables absolute microbial quantification and extraction QC in 16S rRNA amplicon sequencing and metagenomic workflows.