BME100 s2015:Group16 12pmL5

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BME 100 Spring 2015 Home
Lab Write-Up 1 | Lab Write-Up 2 | Lab Write-Up 3
Lab Write-Up 4 | Lab Write-Up 5 | Lab Write-Up 6
Course Logistics For Instructors
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Name: Hanna Monroe
Name: Hanna Monroe
Name: Natkanes Pakjirasirikul
Name: Natkanes Pakjirasirikul
Name: Trevaun Walker
Name: Trevaun Walker
Name: Reaghan Fletcher
Name: Reaghan Fletcher
Name:Thomas Murphy
Name:Thomas Murphy



Smart Phone Camera Settings

  • Type of Smartphone: ZTE N9180
    • Flash: No Flash
    • ISO setting:400
    • White Balance:Auto
    • Exposure:Highest
    • Saturation:Highest
    • Contrast:Lowest



  • Distance between the smart phone cradle and drop = 6 cm

Solutions Used for Calibration

Initial Concentration of 2X Calf Thymus DNA solution (micrograms/mL) Volume of the 2X DNA Solution (μL) Volume of the SYBR GREEN I Dye Solution (μL) Final DNA concentration in SYBR Green I solution (μL)
5 80 80 2.5
2 80 80 1
1 80 80 0.5
0.5 80 80 0.25
0.25 80 80 0.125
0 80 80 0

Placing Samples onto the Fluorimeter

  1. Turn on Blue LED Excitation light
  2. Insert a slide into the Fluorimeter
  3. Place camera on the craddle and as close to as possible without getting a blurry picture
  4. Adjust height of fluorimeter so that picture from camera takes a picture of the drop directly from the side
  5. Place an 80 microliter drop of SYBR Green I on the slide so that it looks like a beach ball
  6. Add an 80 microliter drop of the DNA solution to the already placed solution
  7. Align the slide so that the blue LED is focused on the drop
  8. Take the a picture with the timer set and lower the lid of the lightbox
  9. Take a total of 3 pictures then remove the solution from the slide
  10. Move the slide to the next position and repeat the process with the different solutions

Data Analysis

Representative Images of Negative and Positive Samples





Image J Values for All Calibrator Samples

Final DNA concentration in SYBR Green I solution (μg/mL) Area Mean Pixel Value RawIntDen of the drop RawIntDen of the background RawIntDen drop - background

Final DNA concentration in SYBR Green I solution (μg/mL) RawIntDen drop - background ' ' ' Standard Deviation

Calibration curve


PCR Results Summary

  • Our positive control PCR result was .11603 μg/mL
  • Our negative control PCR result was .0575 μg/mL

Observed results

  • Patient 47360 : Average initial concentration of .114425, the bubble observed was clearer than the positive control, however much darker than the negative
  • Patient 31303 : Average initial concentration of .15928, the bubble was much darker the negative control and the patient 1, much closer to the color of the positive control.


  • Patient POS : 2 out of three of the runs ran closer in similarity to the positive control
  • Patient POS : All three of the runs were closer to the positive test

SNP Information & Primer Design

Background: About the Disease SNP

An SNP is a single nucleotide polymorphism(SNP). An SNP occurs when a nucleotide pair, the monomers that create DNA, is altered changing the gene it is contained in creating a polymorphism, a genetic variation. These SNPs occur naturally in biological genomes and through natural selection these mutations are controlled. When an SNP occurs it creates a new allele, a variation in the gene, in a population that if not detrimental will be passed on to the next generation. It is usual for there to be only two different alleles for a specific gene which is the case for the SNP being studied. The disease SNP being studied is rs268. This SNP occurs in Homo Sapiens on the eighth chromosome. The clinical significance of this SNP is that it is pathogenic and it is associated with the LPL gene, the lipoprotein lipase. This gene is involved with processes such as apolipoprotein binding, chylomicron remodeling, and anchoring components of the membrane. This disease is responsible for metabolic syndrome that increase blood pressure, cholesterol levels, excess fat, and blood sugar levels which increases a person risk for stroke, diabetes, and heart disease. The normal allele of this gene is AAT but when the disease is present the mutation creates an allele of AGT.

Primer Design and Testing

The primers worked as expected producing one positive test and one negative test. In the positive test the diseased primer was shown to work. In the negative test the non-disease primer was shown to work. The primers worked by bonding to the DNA and allowing replication to occur if they matched properly. By getting replicated DNA it was confirmed that the primers worked because they were attached. The primers were different at two different points in the forward direction. The non-disease primer would bond allowing replication if the allele was negative for the disease because it ended in an 'A' nucleotide which the gene has if it does not have the disease. The disease primer bonded and allowed replication to occur if the diseased allele was because it ended in a 'G' which the gene would have in at that location if the disease was present. The two nucleotide primers can be seen below.

Non-Disease Primer Image:Primer Valid.jpg

Disease Primer Image:Primer Invalid.jpg

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