Interleukin-3 belongs to a family of cytokines, which includes IL-5 and GM-CSF. It signals through a receptor complex comprising of an IL-3 specific IL-3 receptor alpha subunit (IL3RA) and a common beta chain, which is shared between all members of this cytokine family. Binding of IL-3 to IL3RA recruits the beta chain to the complex, which activates the JAK/STAT, MAPK and PI 3-kinase signaling modules. Source: NetPath http://www.netpath.org/pathways?path_id=NetPath_15 NetPath:15 - IL-3 Signaling Pathway. NetPath (http://www.netpath.org) is a collaborative project between PandeyLab at Johns Hopkins University (http://pandeylab.igm.jhmi.edu) and the Institute of Bioinformatics (http://www.ibioinformatics.org). If you use this pathway, you must cite the NetPath website until the pathway is published. http://www.netpath.org This pathway was inferred from Homo sapiens pathway [http://www.wikipathways.org/index.php?title=Pathway:WP286&oldid=21281 WP286(r21281)] with a 90% conversion rate. interleukin-3 signaling pathway PW:0000968 Pathway Ontology