TY - JOUR T1 - Polymorphism across an exon-intron boundary in an avian Mhc class II B gene JF - Molecular Biology and Evolution Y1 - 1999 A1 - D Garrigan A1 - SV Edwards VL - 16 UR - http://mbe.oxfordjournals.org/content/16/11/1599.full.pdf ER -