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Cell Ranger


10x Genomics
Chromium Single Cell Gene Expression

3' Cell Multiplexing Outputs

This page describes the output file structure from the cellranger multi subcommand specifically for 3' Cell Multiplexing data. This subcommand was introduced in Cell Ranger 5.0 for joint analysis of 5' gene expression and V(D)J (GEX + VDJ) data, and in Cell Ranger 6.0 for 3' Cell Multiplexing data.

Table of Contents


Upon completion, the cellranger multi subcommand will produce an outs/ directory with the following structure:

cellranger web summary

Using the tree Linux command, the file structure looks like this:

├── config.csv
├── multi
│   ├── count
│   └── multiplexing_analysis
└── per_sample_outs
    ├── Sample1
    └── Sample2

The first section of the outputs contains the config.csv file, a duplicate of the input config CSV file. The files in the multi folder are generic to the entire Cell Multiplexing experiment, while the files in the per_sample_outs directory have been demultiplexed to single samples.

Cell Multiplexing outputs directory

Within the multi directory, there are count and multiplexing_analysis directories:

└─ multi
   ├── count
   │   ├── feature_reference.csv
   │   ├── raw_cloupe.cloupe
   │   ├── raw_feature_bc_matrix
   │   │   ├── barcodes.tsv.gz
   │   │   ├── features.tsv.gz
   │   │   └── matrix.mtx.gz
   │   ├── raw_feature_bc_matrix.h5
   │   ├── raw_molecule_info.h5
   │   ├── unassigned_alignments.bam
   │   └── unassigned_alignments.bam.bai
   └── multiplexing_analysis
       ├── assignment_confidence_table.csv
       ├── cells_per_tag.json
       ├── tag_calls_per_cell.csv
       └── tag_calls_summary.csv

The count directory contains raw files that include cells and background data:

Output File Description
feature_reference.csv Feature reference (contains both CMO and Feature Barcode) used for this sample
raw_cloupe.cloupe A Loupe-readable file containing all cell-associated barcodes in the experiment. This cloupe file also contains UMI counts for all tags (prior to tag assignments), which could be useful for troubleshooting Cell Multiplexing library issues.
raw_feature_bc_matrix A matrix of UMI counts per (feature, barcode) pair, in MEX format. This matrix contains every barcode from the fixed list of known good barcode sequences that has at least one read. This includes background and cell-associated barcodes.
raw_feature_bc_matrix.h5 A matrix of UMI counts per (feature, barcode) pair, in H5 format. This matrix contains every barcode from the fixed list of known good barcode sequences that has at least one read. This includes background and cell-associated barcodes.
raw_molecule_info.h5 Information about all molecules in the experiment. This file includes background and cell-associated barcodes, and cannot be used as input for cellranger aggr pipeline.
unassigned_alignments.bam Alignments from barcodes not assigned to any sample.
unassigned_alignments.bam.bai Alignments from barcodes not assigned to any sample (index).

The multiplexing_analysis directory contains:

Output File Description
assignment_confidence_table.csv A table that contains all information from the tag assignment algorithm for each cell-associated barcode, in CSV format. More details below.
cells_per_tag.json Lists the cell-associated barcodes that were assigned a given tag, for each tag, in JSON format.
tag_calls_summary.csv A table that summarizes the multiplexing results, including the number of cells assigned no tag, one tag, and more than one tag, in CSV format. More details below.
tag_calls_per_cell.csv For each cell-associated barcode assigned a tag, this table summarizes the tags assigned and the UMI counts per tag, in CSV format. More details below.

Assignment confidence table

The assignment_confidence_table.csv table provides a summary of all the information from the tag-assignment algorithm for each cell-associated barcode, including the probability that a given barcode belongs to a given state. The user may modify the confidence threshold for assigning tags to barcodes on their own in a data-science environment like Python or R to enable further downstream analysis.


Column descriptions:

Tag calls summary

The tag_calls_summary.csv summarizes multiplexing results by providing statistics about categories including the number of cells assigned no tag, one tag, more than one tag, etc. The category No tag assigned includes both cells that were considered Blanks and cells considered Unassigned.

No tag molecules,0,0.0,None,None
No tag assigned,386,2.9,None,None
1 tag assigned,12465,93.6,None,None
More than 1 tag assigned,472,3.5,None,None

Column descriptions:

Tag calls per cell

The tag_calls_per_cell.csv file contains tag calls per cell, one line for each barcode.


Column descriptions:

Demultiplexed sample outputs directory

The per_sample_outs directory contains sample-level files with data from cells only (background data filtered out):

├── count
│   ├── analysis
│   │   ├── clustering
│   │   ├── diffexp
│   │   ├── pca
│   │   ├── tsne
│   │   └── umap
│   ├── cloupe.cloupe
│   ├── feature_reference.csv
│   ├── sample_alignments.bam
│   ├── sample_alignments.bam.bai
│   ├── sample_barcodes.csv
│   ├── sample_feature_bc_matrix
│   │   ├── barcodes.tsv.gz
│   │   ├── features.tsv.gz
│   │   └── matrix.mtx.gz
│   ├── sample_feature_bc_matrix.h5
│   └── sample_molecule_info.h5
├── metrics_summary.csv
└── web_summary.html

The analysis/ directory contains files with the results of: graph-based clusters and K-means clustering from K=2-10; differential expression analysis between clusters; and PCA, t-SNE, and UMAP dimensionality reduction.

The remaining outputs are essentially the same as from cellranger count, and are described in the Gene Expression Outputs section. Learn more about the multi web summary file here.