3.1.3.18 Chlamydomonas enzyme stable, Anacystis enzyme labile 35339 3.1.3.18 Citrate and isocitrate stabilize 35348 3.1.3.18 free phosphatase rapidly precipitates under all the conditions tested 750563 3.1.3.18 stable 652557, 670652 3.1.3.18 zinc coordination promotes the enzyme to a stable conformation 690294