PCR Reaction Mix, 8 tubes, 50 μl each:Mix contains Taq DNA polymerase, MgCl_2, and dNTP's (hp://www.promega.com/resources/protocols/product‐informaon‐sheets/g/gotaq‐colorless
‐master‐mix‐m714‐protocol/)
DNA/ primer mix, 8 tubes, 50 μL each: Each mix contains a different template DNA. All tubes
have the same forward primer and reverse primer
A strip of empty PCR tubes
Disposable pipette tips: only use each only once. Never reuse disposable pipette tips. If you do, the samples will become cross-contaminated.
Cup for discarded tips
Micropipettor
OpenPCR Machine: shared by two groups
PCR Reaction Report
Our team had an easy time pipetting the samples to set up the reactions. The pre-lab reading was very helpful in understanding the procedures we performed today, as it showed visually and audibly how to pipette solutions. By knowing how the lab was going to function, we had an advantage in the execution and understanding of the procedure.
In our group, Mia and Michelle pipetted the solutions for Lab C. For Lab D, Gabe and Damian pipetted the solutions. We were able to easily understand the difference between the first and second stops on the pipettor. The final samples all contained the same amount of liquid. There was not any liquid left in the tubes that the DNA samples and PCR reactions were mixed in. We did not change our labeling scheme for our test tubes. Overall, the pipetting was relatively simple and easy, because the group was knowledgeable on the proper technique from the pre-lab reading and quiz.
Fluorimeter Procedure
Imaging set-up
To capture images from the flourimeter, a smartphone with decent camera quality needs to be placed in the phone cradle directly opposite from the light beam from the light box. If possible, the flash should be inactivated, the ISO should be set to above 800, the white balance should be set to auto, the exposure and saturation should be set to the highest setting, and the contrast should be set to the lowest setting.
Using the micropipettor, place a 160mL drop of water in between the first two rows of your slide.
Switch the excitation light on for the blue LED.
Turn on your cell phone camera, turn off the flash, set ISO to 800 or higher, set white balance to auto, change exposure to the highest setting, set saturation to the highest setting, and finally change contrast to the lowest setting.
Set your smartphone in the cradle with the camera facing the slide. Adjust the fluorimeter using the plastic trays so that the camera takes a picture of the drop sideways.
Adjust the smartphone so that it is as close as possible to the drop, while still remaining in focus.
Record the distance between the smartphone and the drop using a ruler.
Placing Samples onto the Fluorimeter
Using the micropipettor, place an 80 microliter drop of SYBR Green I in the middle of the first two rows of the slide. Add 80 microliters of calf thymus solution to the drop to form a sample.
Align the drop so the blue led is focused.
Set a timer on your camera to take a picture after the light box is lowered. Take three pictures of the drop.
Remove the box, repeating the steps for the rest of the calf thymus DNA.
Be sure to take three independent pictures for each sample for accuracy.
Data Collection and Analysis
Images of High, Low, and Zero Calf Thymus DNA
5 μg/mL sample
0.5 μg/mL sample
zero DNA
Calibrator Mean Values
Sample Number
Image number
Final DNA concentration in SYBR Green I solution (µg/mL)
AREA
Mean Pixel Value
RAWINTDEN OF THE DROP
RAW INTDEN OF THE BACKGROUND
RAW INTDEN OF DROP - BACKGROUND
C-1
1
2.5
15619
108.259
2182112
16852
2165260
C-1
2
2.5
15619
106.871
1669212
26755
1642457
C-1
3
2.5
15619
107.15
1673578
29364
1644214
C-2
1
1
13000
96.532
1660418
15706
1644712
C-2
2
1
13000
98.662
1282601
24797
1257804
C-2
3
1
13000
99.286
1290719
35267
1255452
C-3
1
0.5
13016
67.088
1091093
13081
1078012
C-3
2
0.5
13016
65.979
858787
17376
841411
C-3
3
0.5
13016
65.997
859014
22674
836340
C-4
1
0.25
17248
143.822
2480636
31760
2448876
C-4
2
0.25
17248
143.955
2482937
54794
2428143
C-4
3
0.25
17248
143.871
2481487
36320
2445167
C-5
1
0.125
24341
130.123
3167314
34281
3133033
C-5
2
0.125
24341
129.906
3162054
36420
3125634
C-5
3
0.125
24341
130.106
3166904
40053
3126851
C-6
1
0
12984
75.043
974360
24886
949474
C-6
2
0
12984
71.294
925681
22969
902712
C-6
3
0
12984
74.652
969284
21450
947834
Calibration curves
Images of Our PCR Negative and Positive Controls
Negative Control
Positive Control
PCR Results: PCR concentrations solved
PCR Product TUBE LABEL
Image Number
AREA
Mean Pixel Value
RAWINTDEN OF THE DROP
RAWINTDEN OF THE BACKGROUND
RAWINTDEN DROP - BACKGROUND
G13 +
1
21980
93.822
2062211
42276
2019935
G13 +
2
21980
93.439
2053781
47206
2006575
G13 +
3
21980
93.815
2062064
46058
2016006
G13 1-1
1
25026
90.712
2270164
36160
2234004
G13 1-1
2
25026
89.746
2245986
47712
2198274
G13 1-1
3
25026
90.557
2266277
25327
2240950
G13 1-2
1
24263
97.112
2356237
32919
2323318
G13 1-2
2
24263
104.251
2529441
34205
2495236
G13 1-2
3
24263
97.604
2368175
32392
2335783
G13 1-3
1
24056
103.722
2495126
61195
2433931
G13 1-3
2
24056
105.78
2544645
47381
2497264
G13 1-3
3
24056
104.361
2510498
52545
2457953
G13 -
1
23589
116.75
2754018
42957
2711061
G13 -
2
23589
116.88
2757085
35657
2721428
G13 -
3
23589
116.164
2740187
41418
2698769
G13 2-1
1
24360
105.613
2572724
43329
2529395
G13 2-1
2
24360
106.302
2589512
53160
2536352
G13 2-1
3
24360
106.037
2583056
47936
2535120
G13 2-2
1
25806
105.317
2717815
30529
2687286
G13 2-2
2
25806
104.064
2685476
39027
2646449
G13 2-2
3
25806
106.034
2736318
39423
2696895
G13 2-3
1
26668
103.397
2757379
39076
2718303
G13 2-3
2
26668
104.271
2780708
36150
2744558
G13 2-3
3
26668
103.944
2771981
32095
2739886
PCR Results: Summary
Our positive control PCR result was 27.47881297 μg/mL
Our negative control PCR result was 46.3435127 μg/mL
Observed results
Patient #1 81477 : The image for patient 1 shows a greener tint around the bubble that observed. For patient 1 the PCR product concentration was 27.47881297 μg/mL.
Patient #2 68313 : The image observed for patient 2 shows that it doesn't have a strong tint, it is mostly clear. For patient 2 the PCR product concentration was 46.3435127 μg/mL.
Conclusions
Patient #1 81477 : Patient #1's PCR Product Concentration values were most similar to the positive control value. The patient is most likely positive.
Patient #2 68313 : Patient #2's PCR Product Concentration values were most similar to the negative control value. The patient is most likely negative.