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What are the important information should we know about RNA-seq data file before stating any RNA-seq analysis?

What are the important information should we know about RNA-seq data file before stating any RNA-seq analysis for the beginners of this area?

rna-seq

2 answers

RNA-seq for everyone was designed for the RNA-seq beginners in mind.

"A typical RNA-seq experiment consists of the following steps (depicted in figure 3):

  1. Isolate and purify the starting RNA.
  2. Convert it to cDNA.
  3. Convert the cDNA to a library ready for sequencing.
  4. Sequence using one of the available NGS platforms.
  5. Analyze the resulting short sequence-reads.

Although all RNA-seq experiments include these steps, there are many experimental details that must be considered before beginning an experiment."

This is a really nice survey of the library preparation methods.

  • Insert Size, Strand specific information, if the data is paired ends,
  • Adaptor and barcode information used in generating the sequences.
  • If read count is same in both fastq files and properly arranged (if paired)
  • Number of bases you want to trim in the read, by checking the quality score drop using tools like FASTQC.

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