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  • Setting up a 384 well qRT-PCR assay for the ViiA™ 7 using VIAFLO and VOYAGER electronic pipettes

    Pipetting 64 samples in triplicate for two genes of interest (GOI), all under 10 minutes!

    The qRT-PCR is set up by hand, using a VIAFLO 16 channel 125 μl electronic pipette to distribute master mixes of two genes of interest into a 384 well plate. All 64 samples are loaded directly from 1.5 ml microcentrifuge tubes into the 384 well plate in triplicate, using a VOYAGER 8 channel 12.5 μl adjustable tip spacing pipette. The whole process takes less than 10 minutes in real time!

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    The qRT-PCR is set up by hand, using a VIAFLO 16 channel 125 μl electronic pipette to distribute master mixes of two genes of interest into a 384 well plate. All 64 samples are loaded directly from 1.5 ml microcentrifuge tubes into the 384 well plate in triplicate, using a VOYAGER 8 channel 12.5 μl adjustable tip spacing pipette. The whole process takes less than 10 minutes in real time!

Key benefits

A 384 well plate can be filled with a master mix in less than one minute, using a VIAFLO 16 channel pipette and the Repeat Dispense mode.
The VOYAGER adjustable tip spacing pipette enables simultaneous transfer of multiple samples from microcentrifuge tubes to a 384 well plate, saving many extra pipetting steps and time.
Reducing the number of individual transfers minimizes the chance of pipetting errors.

Set up a 384 well qRT-PCR plate by pipetting 64 samples in triplicate

The video shows how quickly and easily you can set up a 384 well qRT-PCR plate by pipetting 64 samples in triplicate for two genes of interest (GOI 1 and GOI 2).

Both master mixes are transferred from a microcentrifuge tube into a 10 ml polystyrene multichannel reagent reservoir using a single channel pipette. The GOI 1 master mix is then transferred to the left half of the 384 well plate, and the GOI 2 master mix to the right half, using the Repeat Dispense mode of the VIAFLO 16 channel 125 μl electronic pipette. Next, all 64 samples are transferred in triplicate into both the GOI 1 and GOI 2 master mixes using a VOYAGER 8 channel 12.5 μl pipette. The VOYAGER pipette’s tip spacing can be adjusted on the fly for center-to-center spacing of the tubes and the plate, enabling simultaneous direct transfer of multiple samples.

Video: Setting up a 384 well qRT-PCR assay using INTEGRA’s electronic pipettes

Step-by-step procedure

 

1. Transfer GOI 1 and GOI 2 master mixes into a 384 well plate 

Add GOI 1 master mix to the left half of a 384 well plate and GOI 2 master mix to the right half (see Figure 1).

Use a VIAFLO 16 channel 125 μl electronic pipette with 125 μl Sterile, Filter GRIPTIPS®.
Select the Repeat Dispense mode and set it to dispense 12 x 7.5 μl. Depending on the viscosity of the master mix, a lower pipetting speed (e.g. speed 6) is recommended. A Pace option can be activated to minimize the need to press the pipette’s run button during dispensing, and enable automatic sequential dispensing.

Figure 1: Pipetting scheme for GOI 1 and GOI 2 master mixes
Figure 1: Pipetting scheme for GOI 1 and GOI 2 master mixes

2. Transferring 64 samples into a 384 well plate

Add 64 samples of GOI 1 and GOI 2 in triplicate to the master mix.

All 64 samples in microcentrifuge tubes are divided into 2 x 32 samples lined up in either a yellow or green rack and then transferred in triplicate to the GOI 1 and GOI 2 master mixes (see Figure 2), using a VOYAGER 8 channel 12.5 μl adjustable tip spacing pipette with 12.5 μl Sterile, Filter GRIPTIPS.
Choose the Repeat Dispense mode and set it to dispense 3 x 2.5 μl. A post-dispense of 1-2 μl is recommended for optimal dispensing performance. Two tip spacings are set: 13 mm (tubes in the tube rack) and 4.5 mm (center-to-center spacing of 384 well plates).

Figure 2: Pipetting scheme of the qRT-PCR assay
Figure 2: Pipetting scheme of the qRT-PCR assay

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Used instruments and accessories

VOYAGER, 8 Channel, 12.5 µl, electronic pipette

VOYAGER pipettes allow the tip spacing to expand anywhere between 4.5 mm and 33 mm at the push of a button.

  • Single handed operation leaves the other hand free to handle labware.
  • On the fly access to up to 3 user-defined tip spacings.
  • These user defined tip spacings are saved. No need to memorize spacings of different labware formats.

Part No. 4721

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VOYAGER adjustable tip spacing pipette

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Customer’s voice

There are clear advantages of manual set-up using VIAFLO and VOYAGER pipettes. While liquid handling robots can be a good option for routine processing of large sample numbers, handheld pipettes like these give far greater control over changing sample numbers and layouts. You can pipette a 384 well plate by hand in the time it takes to set up the robot.

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