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10 protocols using sybr green mix

1

Total RNA Extraction and qPCR Analysis

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Total RNAs were extracted using TRI reagent (Sigma) and 1-bromo-3-chloropropane (Sigma) according to the procedure of the manufacturer. RNAs were precipitated with half volume of isopropanol and half volume of high salt precipitation buffer (0.8 M sodium citrate and 1.2 M sodium chloride). RNA samples were treated with DNaseI (Roche) and purified by RNeasy Mini Kit (Qiagen) according to the procedure of the manufacturers.
Total RNAs (3 µg) were used for generating cDNAs in a 20 µl volume reaction according to Invitrogen Superscript II Reverse Transcriptase protocol. The obtained cDNAs were diluted five times, and 1 µl were used for 10 µl qPCR reaction.
qPCR was performed in 10 µl final volume using 5 µl SYBR Green mix (Sigma), 1 µl diluted cDNAs, and primers. qPCR was run on the CFX96 Real-Time System C1000 thermal cycler (Biorad) using the following program: (1) 95°C, 3 min; (2) [95°C, 30 sec, then 60°C, 30 sec, then 72°C, 30 sec]×45, 72°C, 10 min followed by a temperature gradient from 55°C to 95°C. The relative expression values were determined using EF-1α (At5g60390) as a reference gene and the comparative cycle threshold method (2−ΔΔCt). Primers used for qPCR are listed in Table S10.
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2

Quantitative PCR Analysis of Gene Expression

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Total RNA was extracted with the RNeasy mini kit (#74106, Qiagen) according to the manufacturer’s introduction. RNA quality was assessed using NanoDrop 2000 and a total of 400ng RNA were used for reversed transcription using High-Capacity cDNA Reverse Transcription Kit (#4375575, ABI) with random primers. Quantitative real-time PCR was performed by BIO-RAD CFX96 real time PCR system with SYBR Green Mix and specific primers (Sigma). Data were normalized to the expression of housekeeping GAPDH gene and the relative abundance of transcripts was calculated by the 2−ΔΔCt method.
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3

Imaginal Disc RNA Isolation and RT-PCR

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Imaginal disc tissues (including brain) were dissected and total RNA was isolated using TRIzol (Invitrogen) for RT-PCR. Total RNA (2 μg) was reverse-transcribed using Moloney murine leukemia virus reverse transcriptase (Promega) and random primers following the protocol of the manufacturer. PCR was performed in triplicate using SYBR Green Mix (Sigma) and a real-time PCR system (Bio-Rad). The Primer sequences were: tefu(F): GGGATTCGATAAACTGGC; tefu(R): AAAGGCAGCAGGCAGGTC; Rad50(F): CGGAGTTTCGGCACCTATG; Rad50(R): TCTTTCCGCATCCGTTCTC; Rp49(F) ACAGGCCCAAGATCGTGAAGA; and Rp49(R) CGCACTCTGTTGTCGATACCCT.
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4

Quantitative PCR of FFPE Tissues

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Total RNA was extracted from paraffin tissues using FFPE-RNA isolation kit (RTA) and reverse transcribed using cDNA reverse transcription kit (Thermo Fisher) according to manufacturer’s protocols. Quantitative PCR was done using SYBR Green mix (Sigma Aldrich). Reactions were performed in triplicate in a 96-multiwell plate (Roche). Gene expressions were normalized to 18S rRNA, and fold differences were calculated using the comparative CT method: 2-(ΔΔCT), where ΔΔCT refers to (normalized control sample) − (normalized treated sample) as previously described [6 (link)].
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5

RNA Isolation and qRT-PCR Analysis

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RNA was isolated according to Chomczynski and Sacchi [26 (link)] using Fenozol (A&A Biotechnology, Gdynia, Poland). Reverse transcription was performed with RevertAid Reverse Transcriptase polymerase (Thermo Fisher Scientific, Waltham, MA, USA) after confirmation of the RNA concentration and purity on a NanoDrop 1000 (Thermo Fisher Scientific, Waltham, MA, USA)F. qRT-PCR with SybrGreen Mix (Sigma-Aldrich, St. Louis, MO, USA) was performed using specific primers (Table 1). Eukaryotic translation elongation factor 2 (EEF2) was used for gene expression normalization. The reaction was performed using a StepOnePlus TM Real-time PCR System (Applied Biosystems, Foster City, CA, USA). The relative gene expression level was calculated as 2−ΔCT, where ΔCT is defined as a difference between CT values obtained for the gene of interest and housekeeping gene EEF-2. Data were normalized to the control cells.
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6

ChIP-qPCR Assay for MITF Binding

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Chromatin immunoprecipitation was performed as described (Shaffer et al., 2008) with the following modifications: Thirty million cells were crosslinked with 0.4% formaldehyde, and chromatin was sheared by sonication using a probe sonicator (Epishear, Active Motif). Immunoprecipitation was performed with Protein G Dynabeads (10003D, Life technologies), with a total of 10 µg of anti-MITF antibody (Cosmo Bio Co., BAM-73-107-EX)47 (link). Purified ChIP samples and corresponding input DNA were analysed by qRT-PCR using SYBR-Green mix (#4438, Sigma-Aldrich) on an ABI 7500 qPCR machine (annealing at 60 °C) using region specific primers (Sup. Table 6). The resulting qPCR data were then analysed as described above.
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7

Quantitative PCR Analysis of Gene Expression

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Total RNA was extracted from cell lines using an RNAeasy mini kit (Qiagen) and reverse transcribed using Transcriptor First Strand cDNA Synthesis Kit (Roche) according to manufacturer’s protocols. Quantitative PCR was done on an Eppendorf Mastercycler using SYBR Green mix (Sigma Aldrich). Reactions were performed in triplicate in a 96-multiwell plate (Eppendorf, #30132700). Gene expressions were normalized to 18S rRNA, and fold differences were calculated using the comparative CT method: 2−(ΔΔCT), where ΔΔCT refers to (normalized control sample) − (normalized treated sample). Primer pairs were as follows—18S rRNA: sense: 5′-cttagagggacaagtggcg-3′, antisense: 5′-acgctgagccagtcagtgta-3′; aurora kinase A: sense: 5′-tctagtcctccttaaccacttatct-3′, antisense: 5′-gacacatggcctcttctgtatc-3′; COX2: sense: 5′-tgtacccggacaggattcta-3′, antisense: 5′-cccttgaagtgggtaagtatgt-3′; iNOS: sense: 5′-aaggtctacgttcaagacatcc-3′, antisense: 5′-gcacatcgccacaaacatag-3′; cyclin D1: sense: 5′-gggttgtgctacagatgatgag-3′, antisense: 5′-agacgcctcctttgtgttaat-3′.
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8

Quantitative PCR Transcriptome Analysis

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Briefly, total RNA was extracted from tissue and cell samples using TransZol Up Plus RNA Kit (TransGen Biotech, ER501-01). Subsequently, the total RNA was reverse transcribed into double-stranded cDNA using SuperScript™ IV Reverse Transcriptase (Thermo Fisher, 18090010). Then the qPCR was performed in a total reaction volume of 10 µL containing 5 µL SYBR Green Mix (KCQS00, Sigma Aldrich), 3.6 µL DEPC-H2O, 0.2 µL forward primer, 0.2 µL reverse primer, and 1 µL cDNA (Total amount: 10 ng-100 ng). A two-step method was used: denaturation temperature of 95 °C for 30 s, annealing and extension of 60 °C for 30 s. The details were previously described [36 (link)]. The primers are shown in Tables S2 and S3.
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9

Quantitative Gene Expression Analysis

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Total RNA was extracted from cells using TRIzol reagent (#15596-026, Ambion), DNase treated using the RNase free DNase kit (#79254, Qiagen) and re-purified with the RNeasy Mini kit (#74204, Qiagen). The cDNA was generated with High-Capacity cDNA Reverse Transcription Kit (#4368814, Applied Biosystems). All procedures were performed according to manufacturer’s instructions. Primers were designed for each target gene using NCBI Primer BLAST (Sup. Table 5), and qRT-PCR was performed with SYBR-Green mix (#4438, Sigma-Aldrich) using an Applied Biosystems 7500 qPCR machine (annealing at 60 °C). The qRT-PCR reactions were performed using 5 ng cDNA per 20 µl reaction, in triplicates and relative gene expression was calculated with the D-ΔΔCt method46 (link), using the geometric mean of β-Actin and human ribosomal protein lateral stalk subunit P0 (RPLP0) expression to normalise gene expression of target genes. Standard curves were made for each primer pair and the efficiency calculated using the formula E = 10[−1/slope].
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10

Quantitative PCR Analysis of RNA

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Total RNA was extracted from para n tissues using FFPE-RNA isolation kit (RTA) and reverse transcribed using cDNA reverse transcription kit (Thermo Fisher) according to manufacturer's protocols. Quantitative PCR was done using SYBR Green mix (Sigma Aldrich). Reactions were performed in triplicate in a 96multiwell plate (Roche). Gene expressions were normalized to 18S rRNA, and fold differences were calculated using the comparative CT method: 2-(ΔΔCT), where ΔΔCT refers to (normalized control sample) -(normalized treated sample) as previously described [6].
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