Filtering Normalized Expression Estimates

Prior to differential expression analysis using the transcript-level expression data, filtering is recommended to remove low expressing transcripts as these may be noise. Several filter options are available in Partek Flow, please refer to the "Filter features" section of the Partek Flow documentations to learn more. In this class, the "Noise reduction filter" will be used and will remove transcripts whose sum of expression across samples is less than or equal to 3.