Additional specific amino acid substitutions are also disclosed which characterize and distinguish additional phytases of {HEAD ~ the invention} having {TAIL ~ improved properties} such as temperature and pH stability, pH activity profile, temperature activity profile, substrate profile, improved performance in animal feed in vitro or in vivo 
Additional specific amino acid substitutions are also disclosed which characterize and distinguish additional phytases of { HEAD ~ the invention } having { TAIL ~ improved properties } such as temperature and pH stability , pH activity profile , temperature activity profile , substrate profile , improved performance in animal feed in vitro or in vivo
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