The Mammalian Phenotype Ontology

The Mammalian Phenotype Ontology is being developed by Cynthia L. Smith, Susan M. Bello, Carroll W. Goldsmith and Janan T. Eppig, as part of the Mouse Genome Database (MGD) Project, Mouse Genome Informatics (MGI), The Jackson Laboratory, Bar Harbor, ME. This file contains pre-coordinated phenotype terms, definitions and synonyms that can be used to describe mammalian phenotypes. The ontology is represented as a directed acyclic graph (DAG). It organizes phenotype terms into major biological system headers such as nervous system and respiratory system. This ontology is currently under development. Weekly updates are available at the Mouse Genome Informatics (MGI) ftp site ( as well as the OBO Foundry site ( Questions, comments and suggestions are welcome, and should be directed to, or to GitHub tracker ( MGD is funded by NIH/NHGRI grant HG000330.

Ontology information

Ontology ID: mp
Version: 11-11-2019
Number of terms: 28424
Last loaded: Thu May 06 08:42:39 BST 2021



Janan T. Eppig

Susan Bello

Carroll W. Goldsmith

Cynthia L. Smith




Georgios V. Gkoutos

Anna Anagnostopolous

Christopher Mungall

Michelle Knowlton

Paul Schofield

Melissa Berry

Nicole Vasilevsky

Alicia Valenzuela

Howard Dene




The Mammalian Phenotype Ontology Copyright © 2007, 2008, 2011, 2012, 2015 by The Jackson Laboratory.