We have datasets from a total of seven assays, each accompanied by its corresponding metadata. All experimental data and metadata are stored and managed in a relational database management system (RDBMS). The Understand the data page explains the database schema.

Data composition and table-wise data download

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If you plan to explore datasets through a browser, we recommend accessing the data for each table via the CMI-PB API or using the uniform resource identifier (URI) format, such as https://www.cmi-pb.org/api/<table_name> to download data for each table. Below are the table-specific data URIs.

A.) Experimental data tables

Table Description	Subjects	Specimens	API endpoint
Subject information	172		subject
Specimen information		1103	specimen
Antibody titer levels	166	996	plasma_ab_titer
Gene expression 1	146	666	pbmc_gene_ expression
Cytokine concentration by Olink 2	107	511	plasma_cytokine_concentration_by_olink
Cytokine concentration by Legendplex	105	451	plasma_cytokine_concentration_by_legendplex
Cell frequency data	122	557	pbmc_cell_frequency
T cell polarization data	99	262	t_cell_polarization
T cell activation data	101	260	t_cell_activation

¹ Due to browser rendering limitations, only the top 25 rows of the table are displayed. To explore the full PBMC gene expression data, please download both the training and challenge datasets here
² Read more about Olink Vs Legendplex data comparison here

B.) Supplementary data tables

Table Description	Features	API endpoint
cell type gating information	52	cell_type (Refer our recent paper )
gene (Ensembl ID mapping)	58,302	gene
transcript	Ensembl transcript id mapping	transcript
protein	Ensembl protein id mapping	protein
olink_prot_info	OLINK-UNIPROT id mapping	olink_prot_info

If you still find issues while accessing the data, write us at our solutions center to get them resolve.

Application programming interface

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CMI-PB API works with simple, human-readable URIs ('REST' = Representational State Transfer'). These can be used to resolve and to map identifiers in CMI-PB, and to directly fetch networks and other data items in a number of formats. For more details, please refer to the API documentation which you can find in the developer section of help pages.

Database API Version History

Version	Date	URI	Content
v5_1	Dec 2024	https://www.cmi-pb.org/docs/api/v5_1/	3rd (Public) challenge: Challenge response data (current version)
v5	Aug 2024	https://www.cmi-pb.org/docs/api/v5/	3rd (Public) challenge: Challenge baseline data
v4_1	Feb 2024	https://www.cmi-pb.org/docs/api/v4_1/	2nd (Invited) challenge: Challenge response data
v4	Sept 2023	https://www.cmi-pb.org/docs/api/v4/	2nd (Invited) challenge: Challenge baseline data
v3	Oct 2022	https://www.cmi-pb.org/docs/api/v3/	1st (Internal) challenge: Challenge response data
v2	Oct 2021	https://www.cmi-pb.org/docs/api/v2/	1st (Internal) challenge: Challenge baseline data
v1	Aug 2020	https://www.cmi-pb.org/docs/api/v1/	Pre-1st Challenge: Internal testing