Workflow: scRNA-seq pipeline using Salmon and Alevin

Fetched 2023-01-04 09:23:39 GMT
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Inputs

ID Type Title Doc
threads Integer Number of threads for Salmon
fastq_dir Directory Directory containing FASTQ files

Steps

ID Runs Label Doc
fastqc
steps/fastqc.cwl (CommandLineTool)
Runs fastQC on each fastq file in fastq directory
salmon
steps/salmon.cwl (CommandLineTool)
Run Salmon Alevin tool on FASTQ input
scanpy_analysis
steps/scanpy-analysis.cwl (CommandLineTool)
Dimensionality reduction and clustering
alevin_to_anndata
steps/alevin-to-anndata.cwl (CommandLineTool)
Convert Alevin sparse output to anndata.AnnData object, save as h5ad

Outputs

ID Type Label Doc
umap_pdf File UMAP dimensionality reduction plot
fastqc_dir Directory Directory of FastQC output files, mirroring input directory structure
qc_results File Quality control metrics
count_matrix File Unfiltered count matrix from Alevin, converted to H5AD
filtered_data File Full data set of filtered results: expression matrix, coordinates in dimensionality-reduced space (PCA and UMAP), cluster assignments via the Leiden algorithm, and marker genes for one cluster vs. rest
salmon_output Directory Full output of `salmon alevin`
marker_gene_plot_logreg File Cluster marker genes, logreg method
marker_gene_plot_t_test File Cluster marker genes, t-test
Permalink: https://w3id.org/cwl/view/git/78ab832c111d4263bfa80788b7a1a0b1d101ce66/pipeline.cwl