title: Identification of the IgG1 Induction Factor (Interleukin 4).
authors.affiliation: Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University , Stockholm , Sweden.
authors.forename: Eva
authors.initials: E
authors.lastname: Severinson
keywords: B lymphocytes; Ig class switching; cell culture; interleukin 4; molecular cloning