How do protein concentration ranges compare with the DNA value? (DNA] of 50 µg/ml give an A260 of 1.0 Can you explain the difference?
The most simple and widely used method is the measurement of absorbance at 260 nm for DNA and 280 nm for protein concentration. The purines and pyrimidines in nucleic acids naturally absorb at 260 nm whereas the amino acids tyrosine, tryptophan and cysteine absorb at 280 nm.
How do protein concentration ranges compare with the DNA value? (DNA] of 50 µg/ml give an...
The linear concentration range for the Bradford assay is 20-2000 µg/mL of protein. Protein concentrations below or above these ranges cannot be measured accurately. If it is suspected that a sample contains greater than 50 mg/mL of protein, how can the protein concentration still be measured using the Bradford assay? Explain.
You are given a protein solution with a concentration of 0.15 mg/ml. We need 0.1 µg for an experiment. What volume of the protein solution do we need?
Assume that 50 ug/ml solution of native DNA has an A260 of 1, calculate the concentration of your DNA sample in mg/ml. Then, assuming that 10% of the onion cells mass are the nuclei and that 10% of the nuclei mass is DNA, calculate the percent yield of your isolated DNA. My DNA sample A260 = 0.2204
One of the common methods to quantify DNA is to measure A260 (UV absorbance at 260 nm) of DNA solution using a spectrophotometer. You took 10 µl of your plasmid DNA preparation and dilute with 990 µl of H2O. The A260of this diluted solution was 0.30. Calculate the concentration of your plasmid DNA preparation (before the dilution). It has been established that 50 µg/ml of double-stranded DNA gives A260 = 1.0. My plasmid DNA preparation is _____________________ mg/ml. From this...
1- How do you determine the concentration of your purified DNA sample? What is spectrophotometry? What are the basic principles of spectrophotometry? 2- What is the purpose of determining the A260/A280 ratio? 3- At what wavelength of light does DNA maximally absorb? 4- Explain Gel electrophoresis. How does it work? How is it useful?
how do you determine DNA/RNA purity, how do you determine DNA concentration, how do you determine protein concentration, and how do you determine cell density?).
Given values A260 value of the diluted sample = 0.126 Abs the concentration of DNA in my diluted sample = 6.3ug/ml Dilution factor = 20 MY QUESTION Calculate the concentration of DNA in your undiluted sample - (I got 126ng/ul as an answer but unsure if this is right) calculate the total mass of DNA you isolated *** show work for this pls
DNA quantitation. You measure the absorption spectrum for a sample of DNA and obtain the values listed below. The DNA had been diluted 10 fold. Remember that a solution of DNA that is 50μg/ml (or 50ng/μl) has an absorbance of 1.0 at a wavelength of 260 nm. What is the concentration of the DNA in this sample (In this question DO NOT ignore the problem of dust in the sample and give answer in ng/ul). A260 = 0.80 A280...
Q5: (2) DNA quantitation. You measure the absorption spectrum for a sample of DNA and obtain the values listed below. The DNA had been diluted 10 fold. Remember that a solution of DNA that is 50μg/ml (or 50ng/μl) has an absorbance of 1.0 at a wavelength of 260 nm. What is the concentration of the DNA in this sample (In this question DO NOT ignore the problem of dust in the sample and give answer in ng/ul). A260 = 0.80...
"calculate the total mass of DNA that you isolated at the end of Part A" how would you go about doing this, the concentration in my diluted DNA sample was 6.3ug/ml, and my A60 value was 0.126 Abs i don't know if these numbers help.. part A I had to calculate the concentration of DNA in my undiluted sample to which I did Concentration (ug/mL) = (A260 – A280) dilution factor 50ug/mL C=0.126-0.060 20 50nguL= 66ng/uL and go that the concentration...