2.4.2.31 NAD+-protein-arginine ADP-ribosyltransferase bursa of Fabricius Art7.1, but not Art7.2, is predominant on the surface of B-cells from the bursa of Fabricius as a glycosylphosphatidylinositol-anchored form 705674 2.4.2.31 NAD+-protein-arginine ADP-ribosyltransferase bursa of Fabricius very low level 702911 2.7.7.86 cyclic GMP-AMP synthase bursa of Fabricius high enzyme expression level 761268