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4 protocols using phase lock gel tubes

1

cDNA Generation and qPCR Quantification

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To generate cDNA, total RNA was isolated from frozen cell samples using TRIzol® reagent (ThermoFisher Scientific) and Phase Lock Gel tubes (VWR), treated with Turbo DNase (Thermo Fischer Scientific), and reverse-transcribed using SuperScript® II or SuperScript® III Reverse Transcriptase (ThermoFisher Scientific) with oligo(dT) primers in the presence or absence of RNaseOUT Recombinant Ribonuclease Inhibitor (ThermoFisher Scientific). Quantitative PCR (qPCR) reactions by adding 20 μL master mix containing 1.1X Colorless GoTaq® Reaction Buffer (Promega), 0.7 mM MgCl2, dNTPs (0.2 mM each), primers (0.75 μM each), and 0.1X SYBR Green with GoTaq® DNA polymerase (Promega) to 2 μL cDNA, mock-RT samples, or water in 22 μL reactions. Reactions were run on a LightCycler® 480 Instrument (Roche). Experiments were performed in technical triplicates. RT-qPCR primers used were against ACTB (oBA74: GCTACGAGCTGCCTGACG, oBA75: GGCTGGAAGAGTGCCTCA), KIF2C (oMYC032: CAACTCCAAAATTCCTGCTCC, oMYC033: GAACTGAAAACTGCTTGCGG), TACC3 (oMYC038: ACAGACGCACAGGATTCTAAG, oMYC039: GTTTTGGCATCCACTTCCTTG).
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2

cDNA Synthesis and qPCR Analysis

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To generate cDNA, total RNA was isolated from frozen cell samples using TRIzol reagent (Thermo Fisher Scientific) and Phase Lock Gel tubes (VWR), treated with Turbo DNase (Thermo Fisher Scientific), and reverse-transcribed using SuperScript II or SuperScript III Reverse Transcriptase (Thermo Fisher Scientific) with oligo(dT) primers in the presence or absence of RNaseOUT Recombinant Ribonuclease Inhibitor (Thermo Fisher Scientific). Quantitative PCR (qPCR) reactions by adding 20 μL master mix containing 1.1X Colorless GoTaq Reaction Buffer (Promega), 0.7 mM MgCl2, dNTPs (0.2 mM each), primers (0.75 μM each), and 0.1X SYBR Green with GoTaq DNA polymerase (Promega) to 2 μL cDNA, mock-RT samples, or water in 22 μL reactions. Reactions were run on a LightCycler 480 Instrument (Roche). Experiments were performed in technical triplicates. RT-qPCR primers used were against ACTB (oBA74: GCTACGAGCTGCCTGACG, oBA75: GGCTGGAAGAGTGCCTCA), KIF2C (oMYC032: CAACTCCAAAATTCCTGCTCC, oMYC033: GAACTGAAAACTGCTTGCGG), TACC3 (oMYC038: ACAGACGCACAGGATTCTAAG, oMYC039: GTTTTGGCATCCACTTCCTTG).
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3

Transcriptome Analysis of Male Drosophila Abdomens

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For each of the 42 samples, total RNA was extracted from 10 eviscerated abdomens using a phenol-chloroform extraction followed by ethanol precipitation. A total of 420 male flies were dissected on an ice-cold dissection block removing the head, thorax and loose components of the abdomen. The eviscerated abdomens were then placed in chilled TRIzol and homogenized at 30hz for 4 min in a TissueLyser®. Total RNA was extracted from cell lysates with chloroform using phase lock gel tubes (VWR, Rednor, PA) followed by alcohol precipitation and resuspension in molecular biology grade water. DNA was removed using a Turbo DNA free kit and a final cleanup was done using a Zymo clean and concentrator-5 kit. Concentration and contamination was assessed by nanodrop analysis with additional quality control steps performed by Genewiz, Inc. (South Plainfield, NJ). Transcriptome sequencing was done by Genewiz using an Illumina HiSeq2500 at 6 samples per lane with 50 base pair single end reads.
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4

Quantitative Gene Expression Analysis

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Total RNA was isolated from frozen cell samples using TRIzol reagent (Thermo Fisher Scientific) and Phase Lock Gel tubes (VWR), treated with Turbo DNase (Thermo Fisher Scientific), or using Direct-zol RNA MiniPrep kit. Reverse-transcription was carried using M-MLV (Thermo Fisher Scientific) or SSIII Reverse-transcriptase (Thermo Fisher Scientific) with random hexamer primers (Thermo Fisher Scientific, SO124) in the presence of RNaseIN Recombinant Ribonuclease Inhibitor (Thermo Fisher Scientific). Quantitative PCR (qPCR) was performed with Kappa Sybr Fast qPCR 2x Mix (Roche), according to the manufacturer’s instructions on a LightCycler 480 Instrument (Roche). Experiments were performed in technical triplicates. RT-qPCR primers used are listed in (Table S3).
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