Could anyone tell me any molecular biology company that sequences mitochondrial genome?

I'm looking for a company to sequence the complete mitochondrial genome of some species of fish.

14 December 2020 3,154 3 View

What is the mutation rate in the mtDNA of the Lepidoptera?

I want to determine the phylogenetic age of the members of the Lepidoptera (Sphingidae) based on mtDNA, using BEAST software; But I do not have a good indicator. Please what is mutation rate in...

28 March 2020 1,559 3 View

PDA Detector: Lack on a Wavelength Range, why?

Hello, We have a Shimadzu UHPLC equipment. Recently, the PDA detector lamps have been changed and all tests recommended in the manual have been performed. Apparently that's fine. In the first...

09 September 2019 1,836 3 View

Does anybody has adapted a microtome for plastic resin?

26 May 2016 3,877 5 View

How can I locate the terminator sequences in the pUC19 plasmid?

Hi guys, This might be a dumb question, but I can't locate the terminator sequences for the lacZ gene in the pUC19 plasmid. Apparently none of the maps in the great and mighty Internet (aka...

28 February 2015 8,058 3 View

What could happen when the Glycine is coupling in a sequence elongation process when using Fmoc method?

In the SPPS, we use the Fmoc method. The problem is: along the sequence elongation process, the coupling of the Gly leads to formation of something like lumps. Could be aggregation? Could someone...

12 March 2014 6,106 1 View

What is better: to learn base R first, and then tidyverse; or tidyverse first, and then base R?

A few days ago I asked a question about learning R, and many researchers seem to disagree on whether to start learning by tidyverse or by base R. I would like to hear more opinions before I...

01 January 1970 3,728 25 View

Looking for Materials with high thermal expansion coefficient and high temperature resistance?

03 March 2021 8,272 1 View

I am interested in medicinal chemistry field, which books are highly recommended to learn from?

I am at the beginner level in drug design and drug discovery, and I am interested to learn more about this field. Which books are highly recommended to start from and gives me all essential...

02 March 2021 8,437 2 View

How to grow E.coli on the low salt LB agar plate with 50 or 100ug/ml of Blasticidin?

Hello, I would like to ask how to grow E.coli which resists 50 or 100ug/ml of Blasticidin. I have tried many methods by using low salt Luria-Bertain(LB) agar plate. However, no colonies grow. Let...

01 March 2021 2,027 2 View

Is there a method of determining feed digestibility without the need to re-pellet the feed?

I am aiming to determine the ADC values of a commercial fish feed, but I do not have a steam pelleter or extruder available to me. Ideally, the pellets could be coated with some inert marker....

28 February 2021 7,967 3 View

Are there lab markers/pens resistant to Roti-Histol?

Hi, I'm looking for a pen/marker to write on the smooth, transparent (non-frosted) part of microscopy slides which does not get washed away by alcohols and most importantly Roti-Histol. I want to...

24 February 2021 9,902 5 View

How to empty large intestine in mice ?

Hi all I am working on colon-targeted drug delivery for which I kept mice fasting for 6h using fasting grills during scotophase (dark period). I observed liquid fecal content in the cecum and...

23 February 2021 7,701 2 View

Can I use a protein-devoid condition as my negative control in ELISA?

Hello, I am running a sandwich-type ELISA where I am trying to inhibit a protein-protein interaction using small molecules. For each experiment, I determine my Z' (Z-prime) to determine the...

23 February 2021 7,429 1 View

How does the injection volume impact LLOQ and ULOQ in regression analysis (LC-MSMS)?

Hello, I have run into an issue that has sparkled a debate at work: is the LLOQ/ULOQ impacted by injection volume under the following circumstances: 1) Same dilution factor of all samples 2)...

23 February 2021 9,159 3 View

Can two EC50 values with different hill slopes be compared?

Hello, I fit a classical dose response curve Y=Bottom + (Top-Bottom)/(1+10^((LogEC-X)*HillSlope)) to my data (not related to inhibitors etc). The model I use is purely qualitative but it fits...

23 February 2021 8,155 5 View

I have a problem with kanamycin - why the kanamycin doesn't affect?

Hi everyone, I need to expression of GFP with pET28 plasmid in E. coli BL21(DE3) plysE. Transformed cells have kanamycin and chloramphenicol resistance. Normally, only transformed cells should...

22 February 2021 4,032 4 View