OUR TEAM
LAB 5 WRITE-UP
PCR Reaction Report
The pipetting went fairly smoothly because we took our time to make sure all the samples were transferred properly. We made sure that we understood the difference between the first and second stop on the pipettor before we started pipetting, and there was no visible difference between the different PCR reaction tubes after we were finished. While we were pipetting, we noticed some water on the sides of the tubes with samples and master mix; we tried to use the pipette tip to move these water bubbles down to the rest of the liquid, with which we were fairly successful. At the end, there was a small amount of liquid left in a couple of the master mix/sample tubes; however, the amount of liquid was very small and hopefully had no impact on our reactions. We kept our labeling scheme the same, as our labels fit on the PCR tubes.
Fluorimeter Procedure
Smart Phone Camera Settings
- Type of Smartphone:Galaxy Note 5
- Flash:off
- ISO setting:800
- White Balance: auto
- Exposure:highest
- Saturation:highest
- Contrast:lowest
Camera set-up
Error creating thumbnail: File missing
- Distance between the smart phone cradle and drop =6 cm
Placing Samples onto the Fluorimeter
- Place a clean slide onto the stand, with the beam of light going across the slide between the first and second row of dots
- Using the micropipeter, place 80 µL of CYBR GREEN 1 between the first and second row of dots
- Repeat step 2 using 80 µL of the sample, creating a droplet of 160 µL
- set up the smartphone and cradle at 6 cm from the droplet
- enclose the smartphone cradle and stand in the lightbox
- Take a focused picture of the droplet, ensuring that the lightbox is closed to eliminate excess light
- repeat step 6 for a total of 3 pictures of the droplet
- Remove the droplet using the micropipeter and dispose of into a liquid contamination container
- Repeat steps 2-8 between two rows of the slide that have not been used, using a new slide if the current slide has no remaining sections
Data Collection and Analysis
Images of High, Low, and Zero Calf Thymus DNA
High:
Low:
Zero:
Calibrator Mean Values
| Image No.
|
Initial Concentration of 2X Calf Thymus DNA solution (µg/mL)
|
Volume of the 2X DNA solution (µL)
|
Volume of the SYBR GREEN 1 Dye solution (µL)
|
Final DNA concentration in SYBR Green 1 solution (µg/mL)
|
Area
|
Mean Pixel Value
|
RAW INTDEN of the drop
|
RAW INTDEN of background
|
drop-background
|
mean
|
stdev
|
| 1 |
0 |
80 |
80 |
0 |
94092 |
58.537 |
5507906 |
893875 |
4614031 |
3846014 |
1155168
|
| 2 |
0 |
80 |
80 |
0 |
94092 |
54.743 |
5150917 |
744439 |
4406478 |
3846014 |
1155168
|
| 3 |
0 |
80 |
80 |
0 |
94092 |
36.512 |
3435490 |
917955 |
2517535 |
3846014 |
1155168
|
| 1 |
0.25 |
80 |
80 |
0.125 |
94092 |
40.136 |
3776479 |
914123 |
2862356 |
8419486 |
5612025
|
| 2 |
0.25 |
80 |
80 |
0.125 |
94092 |
96.217 |
9053251 |
741990 |
8311261 |
8419486 |
5612025
|
| 3 |
0.25 |
80 |
80 |
0.125 |
94092 |
153.958 |
14486231 |
401389 |
14084842 |
8419486 |
5612025
|
| 1 |
0.5 |
80 |
80 |
0.25 |
94092 |
154.642 |
14548881 |
406768 |
14142113 |
13686515 |
740442
|
| 2 |
0.5 |
80 |
80 |
0.25 |
94092 |
155.801 |
14659636 |
574360 |
14085276 |
13686515 |
740442
|
| 3 |
0.5 |
80 |
80 |
0.25 |
94092 |
141.559 |
13319604 |
487448 |
12832156 |
13686515 |
740442
|
| 1 |
1 |
80 |
80 |
0.5 |
94092 |
150.074 |
14120798 |
578236 |
13542526 |
16556408 |
2620299
|
| 2 |
1 |
80 |
80 |
0.5 |
94092 |
195.209 |
18367568 |
72899 |
18294669 |
16556408 |
2620299
|
| 3 |
1 |
80 |
80 |
0.5 |
94092 |
192.043 |
18069699 |
237704 |
17831995 |
16556408 |
2620299
|
| 1 |
2 |
80 |
80 |
1 |
94092 |
175.337 |
16497850 |
140985 |
16356865 |
16302758 |
79202
|
| 2 |
2 |
80 |
80 |
1 |
94092 |
176.31 |
16589390 |
249831 |
16339559 |
16302758 |
79202
|
| 3 |
2 |
80 |
80 |
1 |
94092 |
174.256 |
16396106 |
184256 |
16211850 |
16302758 |
79202
|
| 1 |
5 |
80 |
80 |
2.5 |
94092 |
189.254 |
17834387 |
135885 |
17698502 |
17674084 |
127357
|
| 2 |
5 |
80 |
80 |
2.5 |
94092 |
188.669 |
17752211 |
215925 |
17536286 |
17674084 |
127357
|
| 3 |
5 |
80 |
80 |
2.5 |
94092 |
190.491 |
17923659 |
136194 |
17787465 |
17674084 |
127357
|
Calibration curves
Images of Our PCR Negative and Positive Controls
Negative:
Positive:
PCR Results: PCR concentrations solved
| Image No.
|
Sample No.
|
Area
|
Mean Pixel Value
|
RAW INTDEN of the drop
|
RAW INTDEN of background
|
drop-background
|
mean
|
stdev
|
| 1 |
7- + |
94092 |
112.907 |
10623662 |
162252 |
10461410 |
9845694 |
1152910
|
| 2 |
7- + |
94092 |
113.917 |
10718641 |
158615 |
10560026 |
9845694 |
1152910
|
| 3 |
7- + |
94092 |
96.166 |
9048494 |
532848 |
8515646 |
9845694 |
1152910
|
| 1 |
7-1.1 |
94092 |
98.454 |
9263719 |
527349 |
8736370 |
8437331 |
639508
|
| 2 |
7-1.1 |
94092 |
87.533 |
8238034 |
534946 |
7703088 |
8437331 |
639508
|
| 3 |
7-1.1 |
94092 |
97.762 |
9198625 |
326088 |
8872537 |
8437331 |
639508
|
| 1 |
7-1.2 |
94092 |
96.725 |
9101032 |
197410 |
8903622 |
9567110 |
577777
|
| 2 |
7-1.2 |
94092 |
110.965 |
10440939 |
481558 |
9959381 |
9567110 |
577777
|
| 3 |
7-1.2 |
94092 |
113.219 |
10652991 |
814662 |
9838329 |
9567110 |
577777
|
| 1 |
7-1.3 |
94092 |
108.587 |
10217171 |
9909718 |
307453 |
6367965 |
5252061
|
| 2 |
7-1.3 |
94092 |
109.509 |
10303910 |
713864 |
9590046 |
6367965 |
5252061
|
| 3 |
7-1.3 |
94092 |
105.479 |
9924751 |
718355 |
9206396 |
6367965 |
5252061
|
| 1 |
7- - |
94092 |
106.645 |
10034421 |
718304 |
9316117 |
8809274 |
446639
|
| 2 |
7- - |
94092 |
96.731 |
9101598 |
628328 |
8473270 |
8809274 |
446639
|
| 3 |
7- - |
94092 |
99.797 |
9390065 |
751628 |
8638437 |
8809274 |
446639
|
| 1 |
7-2.1 |
94092 |
100.663 |
9471557 |
750034 |
8721523 |
7372011 |
1181741
|
| 2 |
7-2.1 |
94092 |
76.491 |
7197149 |
674898 |
6522251 |
7372011 |
1181741
|
| 3 |
7-2.1 |
94092 |
80.137 |
7540242 |
667983 |
6872259 |
7372011 |
1181741
|
| 1 |
7-2.2 |
94092 |
80.575 |
7581486 |
664167 |
6917319 |
7930410 |
3996626
|
| 2 |
7-2.2 |
94092 |
133.004 |
12514647 |
178556 |
12336091 |
7930410 |
3996626
|
| 3 |
7-2.2 |
94092 |
55.939 |
5263418 |
725598 |
4537820 |
7930410 |
3996626
|
| 1 |
7-2.3 |
94092 |
199.475 |
18768976 |
302792 |
18466184 |
12224300 |
5407461
|
| 2 |
7-2.3 |
94092 |
107.828 |
10145741 |
901673 |
9244068 |
12224300 |
5407461
|
| 3 |
7-2.3 |
94092 |
103.181 |
9708498 |
745850 |
8962648 |
12224300 |
5407461
|
|
|
PCR Results: Summary
- Our positive control PCR result was 3.691388 μg/mL
- Our negative control PCR result was 1.618549334 μg/mL
Observed results
- Patient 1 (54502) : 1-1: 0.874663334 μg/mL 1-2: 3.134221334 μg/mL 1-3: -3.26407 μg/mL
The samples for patient 1 appeared very clear. It is impossible to distinguish any green color by simply looking at the images.
- Patient 2 (84174) : 2-1: -1.255978 μg/mL 2-2: -0.13918 μg/mL 2-3: 8.4486 μg/mL
The samples from 2-1 and 2-2 are both clear. However, the samples from 2-3 appear green.
Conclusions
- Patient 1 (54502) : All the pictures from patient 1 appeared clear, and two of the samples came out below the negative control value. Every sample was below the positive control value. For these reasons, the patient 1 sample failed to replicate during PCR and is therefore negative.
- Patient 2 (84174) : Our data for patient 2 appears to be flawed based on the fact that two of the samples came out below the negative control, while one came out far above the positive control. This correlates with the visual appearance of our pictures. Because sample 2-3 had such a high DNA concentration value, it appears to be an outlier that may be the result of contamination. Based on samples 2-1 and 2-2, patient 2's DNA also failed to replicate, and is therefore negative.
|