This is an exact repeat of the qPCR from earlier today, but using a fresh working stock of the Vtub_16s_V3 primers. The plate layout/qPCR workup is here.
Results: Same as earlier today. Must be a bacterial contaminant somehwere that these 16s primers are picking up. Will order IGS primers that are species specific found in Lee et al. 2002.
This is an exact repeat of the qPCR from Friday, but using a fresh aliquot of water for preparation. The plate layout/qPCR workup is here.
Results: Same as Friday. Fluorescence comes up way too fast and there is contamination present in in the water. Will repeat with a fresh preparation of the primer working stocks.
qPCR was performed using SensiMix/SYBR “kit” with DNAsed RNA samples from 20090224. This qPCR used the new V.tub_16s_V3 primers in hopes of getting better amplification; both in signal intensity and elimination of the double peak seen in the melting curves from 20090224. The plate layou/qPCR workup is here.
Results: Fluorescence comes up WAY too early; at like the 5th cycle! Also, there are two peaks in the melting curves. Additionally, there is a signal in the two water samples and the melting curve for this contamination matches up with one of the melting cure peaks seen in the actual sample melting curves. So, there is some sort of contamination somehwere. Will repeat this using a clean water for the master mix and hope the problem goes away.
This is a repeat of the qPCR from yesterday, but without the 16s and OmpW primer sets due to double peaks in melting curves yesterday. Plate layout/qPCR workup is here.
Results: Similar to yesterday’s results, the amplification looks a bit odd when viewing on a log scale. However, the linear scale curves look to be normal. Melting curves look good for all genes examined and there is not any detectable gDNA in the RNA samples. Excellent…
qPCR was performed using SensiMix/SYBR “kit” with DNAsed RNA samples and cDNA made earlier today. The plate layout/qPCR workup is here.
Results: Generally, the amplification looks a bit odd when viewing on a log scale. However, the linear scale curves look to be normal. There doesn’t appear to be any gDNA contamination in the RNA samples, BUT the Vtub_16sV2 primers used on the RNA samples also do not produce much of a signal in the cDNA either. The melting curves for the 16s and the Vtub_OmpW primer sets have multiple peaks. Will likely order new 16s primes, due to weak signal.
Will redo qPCR on the DNAsed RNA to make sure that the lack of detectable signal is due to lack of gDNA and NOT because the 16s primers don’t work. Also will repeat in order to have a replicate of the other samples.
