CRYSTAL STRUCTURE OF A FORMYLTETRAHYDROFOLATE DEFORMYLASE (PURU, PP_1943) FROM PSEUDOMONAS PUTIDA KT2440 AT 2.05 A RESOLUTION 3NRB HYDROLASE, N-TERMINAL ACT DOMAIN, STRUCTURAL GENOMICS, JOINT CENTER FOR STRUCTURAL GENOMICS, JCSG, PROTEIN STRUCTURE INITIATIVE, PSI-2