sentence: CD4 T cells specific to ovalbumin ( OVA ) were purified from the spleens of B6.Cg-Tg ( TcraTcrb ) 425Cbn / J ( B6.OT-II.CD90.1 ) mice ( graciously provided by Dr. Stephen Schoenberger , La Jolla Institute for Allergy and Immunology , La Jolla , CA ) .