PT - JOURNAL ARTICLE AU - Soohyun Lee AU - Carl Vitzthum AU - Burak H. Alver AU - Peter J. Park TI - Pairs and Pairix: a file format and a tool for efficient storage and retrieval for Hi-C read pairs AID - 10.1101/2021.08.24.457552 DP - 2021 Jan 01 TA - bioRxiv PG - 2021.08.24.457552 4099 - http://biorxiv.org/content/early/2021/08/26/2021.08.24.457552.short 4100 - http://biorxiv.org/content/early/2021/08/26/2021.08.24.457552.full AB - Summary As the amount of three-dimensional chromosomal interaction data continues to increase, storing and accessing such data efficiently becomes paramount. We introduce Pairs, a block-compressed text file format for storing paired genomic coordinates from Hi-C data, and Pairix, an open-source C application to index and query Pairs files. Pairix (also available in Python and R) extends the functionalities of Tabix to paired coordinates data. We have also developed PairsQC, a collapsible HTML quality control report generator for Pairs files.Availability The format specification and source code are available at https://github.com/4dn-dcic/pairix, https://github.com/4dn-dcic/Rpairix and https://github.com/4dn-dcic/pairsqc.Contact peter_park{at}hms.harvard.edu or burak_alver{at}hms.harvard.eduCompeting Interest StatementThe authors have declared no competing interest.