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4 protocols using takara premix taq polymerase

1

Cell-to-CT Taqman Gene Expression Profiling

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A lysis reaction followed by reverse transcription was performed using the kit Taqman Gene Expression Cells-to-CT Kit (ThermoFisher) with ‘Lysis Solution’ followed by the ‘Stop Solution’ at room temperature, and then a reverse transcription with the ‘RT Buffer’, ‘RT Enzyme Mix’, and lysed RNA at 37°C for an hour. Following reverse transcription, cDNA was pre-amplified by adding 2 µL of cDNA from each sample to 8 µL of preamp master mix [5 µL TaKaRa premix Taq polymerase (Clontech), 2.5 µL 0.2X Taqman pooled probe, 0.5 µL H2O] and thermocycled at 95°C for 3 min, 55°C for 2 min, 72°C for 2 min, then 95°C for 15 s, 60°C for 2 min, 72°C for 2 min for 16–20 cycles, and then a final 10°C hold. Amplified cDNA was then diluted 2:100 in RNase-free H2O. Each qPCR assay contained the following reagents: 0.5 uL 20X Taqman probe, 2.5 µL RNase-free H2O, 5 µL Gene Expression Master Mix or Fast Advanced Master Mix (ThermoFisher), and 2 L diluted pre-amplified cDNA. qPCR reactions were performed in triplicate for each Taqman assay of interest on a QuantStudio 3 Real Time PCR Machine (ThermoFisher).
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2

Single-cell mRNA Profiling with Fluidigm

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Plates of FACS-sorted cells were thawed and a combined lysis/denaturation step was performed by incubation at 70°C/4 min, 4°C/5 min, 2.5 µl reverse transcription master mix was then added to each well [1 µl 5× RT buffer (Promega), 0.6 µl 35 mM MgCl2, 0.25 µl Moloney murine leukemia virus (Promega), 0.1 µl 25 mM dNTPs, 0.5 µl H2O] and incubated at 37°C/2 min, 42°C/1 min, 50°C/1 s for 40 cycles, then 85°C/5 min, and 4°C hold. Following RT, cDNA was preamplified by adding 2 µl of cDNA from the RT plate to 8 µl of preamp master mix [5 µl TaKaRa premix Taq polymerase (Clontech), 2.5 µl 0.25X TaqMan pool, 0.5 µl H2O] and thermocycled at 95°C/3 min, 55°C/2 min, 72°C/2 min, then 95°C/15 s, 60°C/2 min, 72°C/2 min for 16 cycles, and 4°C hold. Amplified cDNA was then diluted 1:50 in nuclease-free H2O and this material was used for qPCR against a curated panel of 48 TaqMan Gene Expression Assays (Table 1) on 48.48 dynamic arrays using a Biomark HD system (Fluidigm).
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3

Single-Cell Gene Expression Profiling

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Plates of FACS-sorted cells were thawed, and a combined lysis and
denaturation step was performed by incubation at 70 °C for 4 min, 4
°C for 5 min. Reverse transcription (RT) master mix (2.5 μl) was
then added to each well (1 μl 5× RT Buffer (Promega), 0.6
μl 35 mM MgCl2, 0.25 μl Moloney Murine Leukemia Virus
(MMLV) (Promega), 0.1 μl 25 mM dNTPs, 0.5 μl H2O) and
incubated at 37 °C for 2 min, 42 °C for 1 min and 50 °C for
1 s for 40 cycles, then 85 °C for 5 min, and 4 °C hold. Following
RT, cDNA was pre-amplified by adding 2 μl of cDNA from the RT plate to 8
μl of preamp master mix (5 μl TaKaRa premix Taq polymerase
(Clontech), 2.5 μl 0.25× Taqman pool, 0.5 μl
H2O) and thermocycled at 95 °C for 3 min, 55 °C for 2
min, 72 °C for 2 min, then 95 °C for 15 s, 60 °C for 2 min,
72 °C for 2 min for 16 cycles, and 4 °C hold. Amplified cDNA was
then diluted 1:50 in nuclease-free H2O and this material was used for
qPCR against a curated panel of 30 TaqMan Gene Expression Assays (Supplementary Table 2) on
48.48 dynamic arrays using a Biomark HD system (Fluidigm).
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4

Gene Expression Analysis via Reverse Transcription and qPCR

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A lysis reaction followed by reverse transcription was performed using the kit Taqman Gene Expression Cells-to-CT Kit (ThermoFisher) with “Lysis Solution” followed by the “Stop Solution” at room temperature, and then a reverse transcription with the “RT Buffer”, “RT Enzyme Mix”, and lysed RNA at 37 °C for an hour. Following reverse transcription, cDNA was pre-amplified by adding 2 µL of cDNA from each sample to 8 µL of preamp master mix [5 µL TaKaRa premix Taq polymerase (Clontech), 2.5 µL 0.2× Taqman pooled probe, 0.5 µL H2O] and thermocycled at 95 °C for 3 min, 55 °C for 2 min, 72 °C for 2 min, then 95 °C for 15 s, 60 °C for 2 min, 72 °C for 2 min for 16 cycles, and then a final 10 °C hold. Amplified cDNA was then diluted 2:100 in RNase free H2O. Each qPCR assay contained the following reagents: 0.5 µL 20× Taqman probe, 2.5 µL RNase free H2O, 5 µL Fast Advanced Master Mix (ThermoFisher), and 2 µL diluted pre-amplified cDNA. qPCR reactions were performed in triplicate for each Taqman assay of interest on a QuantStudio 3 Real Time PCR Machine (ThermoFisher).
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