Question: Total genomic DNA Concentration for cows (healthy and infected) milk microbiome study
gravatar for nazmul.hoque90
8 days ago by
nazmul.hoque900 wrote:

I have extracted DNA from cows milk using Promega FFS Nucleic Acid extraction kits and Promega blood cell DNA purification kits in Maxwell 16 automated system. Now after quantification and bio-analysis, I performed NGS following library preparation using Illumina Nextera XT library preparation kits (NextSeq 500 machine) with a concentration of 0.2ng DNA per micro-liter, and got the sequence result. After QC and downstream analyses, I found only 0.122 million mapped reads/sample, which is too low for a typical microbiome study. I need at least 4.0 - 6.0 million mapped reads/sample from the DNA samples. What can I do now? or Shall I go for further DNA concentration? If so, how I can concentrate the DNA samples?

ADD COMMENTlink modified 8 days ago by Jennifer Hillman Jackson24k • written 8 days ago by nazmul.hoque900
gravatar for Jennifer Hillman Jackson
8 days ago by
United States
Jennifer Hillman Jackson24k wrote:


We can help with using Galaxy at this forum. For community advice about tuning laboratory methods, try a general biology/bioinformatics forum. Examples:,, and

I am not sure if you are doing the analysis in Galaxy or not, but a data format or tool usage issue can also lead to unexpected results (when using any bioinformatics tools, in Galaxy or not). So you may want to also review here if using Galaxy for those steps:

Thanks, Jen, Galaxy team

ADD COMMENTlink written 8 days ago by Jennifer Hillman Jackson24k
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