Expression, refolding, and purification of recombinant human phosphodiesterase 3B: definition of the N-terminus of the catalytic core - Varnerin, J P; Chung, C C; Patel, S B; Scapin, G; Parmee, E R; Morin, N R; MacNeil, D J; Cully, D F; Van der Ploeg, L H; Tota, M R (Protein Expr Purif, 2004)