BME103:W930 Group4 l2

From OpenWetWare
Revision as of 22:27, 25 November 2012 by Lauren N Allison (talk | contribs) (Thermal Cycler Engineering)
Owwnotebook icon.png BME 103 Fall 2012 Home
Lab Write-Up 1
Lab Write-Up 2
Lab Write-Up 3
Course Logistics For Instructors
Wiki Editing Help
BME494 Asu logo.png


Name: Christian Vargas
Name: Jake Krammer
Research and Development
Name: Jan Simper
Research and Development
Name: Renaad Mohammed
Name: Lauren Allison
Open PCR Machine Engineer(s)
Name: Justus Vangor
Open PCR Machine Engineer(s)


Thermal Cycler Engineering

Our re-design is based upon the Open PCR system originally designed by Josh Perfetto and Tito Jankowski.

System Design

PCR with Drawers.PNG

Key Features


The new casing will become larger to implement a set of two drawers in the front. They will be placed near the top of the case and in the middle of the front panel. These will hold the additional sample plates being added to the design, providing for higher testing numbers and easier separation of sample groups.

Heat Sinks/Fans/Mounting Plates:

The new design will have two of heaters attached to two fans, one corresponding to each drawer of sample plates and placed beneath them, just as they were placed beneath the original heat lid. Adding additional heating and cooling elements will allow the machine to adjust the temperature of more samples, more quickly. Similarly, another mounting plate will be added to correct for the increase in sample plate size. The new, larger mounting plate will accommodate all the additional PCR blocks.

PCR Blocks/Square Aluminum Adapter Plates/Thermal Pads:

As the main component of the new design, sample plates have been added. Within the framework of each drawer, and placed atop the mounting plate which has been adjusted for size, four square aluminum adapter plates will be laid down. On top of them, four ceramic peltier heaters, followed by four PCR blocks (each of which contains 16 wells). All these elements will be lined with thermal padding. This expands the sample number from 16 to 128 spread across two drawers, while still maintaining accuracy in temperature fluctuation between sample sets.


Once the new sample plates have been placed within the mounting plate, along with all the thermal padding and heating elements, additional insulation will need to be added. Around the perimeter of the four consecutive plates, white insulation strips will be placed just as before around the single plate to ensure that the temperature of the samples is not lost through the PCR block.


All instructions from the original PCR design will be followed with these new-design exceptions:

The Core:

Find these parts-

  • Heat Sinks (2) and Fans (2)
  • Small screws (16)
  • Metal Arms (4 left, 4 right)

1) The 8 heat sink arms have plastic clips. These clips need to be removed.

2) Find your pliers and break off 4 of the black plastic tabs. Avoid bending the metal arm.

3) Remove the stickers on top of the heat sinks that read "Please peel off label".

4) Use 4 aluminum screw to mount the arms onto the heat sinks. Make sure all the arms angle down.

5) Repeat for the remaining arms.

Now find these parts-

  • Aluminum Mounting Plates (8)
  • Square Aluminum Adapter Plates (8)
  • Ceramic Peltier Heaters (8)
  • 16 well PCR Blocks (8 - Note: Fragile)
  • Metal short screws 5 mm diameter (32)
  • Black plastic spacers 10 mm diameter (32)
  • Small button head screws (32)
  • Plastic washers (32)
  • Insulation strips (16)
  • Gray thermal pads (24)
  • Thermal Paste

1) Working with one heat sink and one mounting plate, align the mounting plate.

2) Using a 5 mm screw and a 10 mm black plastic washer, screw the mounting plate into the heat sink. Repeat with the other 3 screws.

3) Repeat steps 1 and 2 with the second heat sink and mounting plate.

1) Find one square aluminum adapter plate. Take one thermal pad, ensuring it does not touch or rub against anything. Remove the adhesive backing from the thermal pad and stick it to the adapter plate.

2) Find one peltier heater and another thermal pad. Stick a thermal pad to the heater and set aside.

3) Find one PCR block and another thermal pad. Attach the thermal pad to the underside. Set aside carefully.

4) Repeat steps 1 through 3 to create 7 more thermal-pad lined adapters/heaters/PCR blocks.

1) Squirt a small amount of the thermal paste onto the copper-aluminum parts of the heat sink. Do not cover the whole surface.

2) Stack one aluminum plate, peltier, and block with all thermal pads facing down into one corner notch of the mounting plate.

3) Using the tiny screws, mount the heat block to the notches in the mounting plate.

4) Repeat with the 7 additional sets, creating and mounting 7 heat blocks.

5) Remove the backing from the insulation strips and attach them to the perimeter of the heat blocks.



PCR Protocol

DNA Measurement Protocol

Research and Development

Background on Disease Markers

Our group decided to look at two different diseases, metabolic syndrome and cardiovascular disease. Metabolic syndrome is a name for a group of risk factors that occur together and increase the risk for coronary artery disease, stroke, and type 2 diabetes. Cardiovascular disease refers to any disease that affects the cardiovascular system, principally cardiac disease, vascular diseases of the brain and kidney, and peripheral arterial disease. The associated mutation for metabolic syndrome was rs1800206, and for cardiovascular disease it was rs1801253.

Primer Design

Forward Primer:

Reverse Primer: 5'TCACAAGTGCC3'