title: Hematopoietin sub-family classification based on size, gene organization and sequence homology.
abstract: The hematopoietins constitute a family of structurally related proteins that includes many cytokines, growth factors and hormones. We propose a classification for hematopoietins based on their size, gene organization and sequences; in addition, we further suggest that three cytokines, IL-11, IL-12 alpha chain and IL-13, are hematopoietins, and we place them in specific subgroups.
authors.affiliation: Laboratory of Immunology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20892, USA.
authors.forename: J L
authors.initials: JL
authors.lastname: Boulay
authors.forename: W E
authors.initials: WE
authors.lastname: Paul