These polypeptides have an amino acid sequence which has at least 70% identity to {HEAD ~ either} of three phytases derived from the bacterium Buttiauxella, and which comprises at least one of the following amino acids at {TAIL ~ the position} indicated: 119N, 120L, and 121E. These phytases have an improved specific activity 
These polypeptides have an amino acid sequence which has at least 70 % identity to { HEAD ~ either } of three phytases derived from the bacterium Buttiauxella , and which comprises at least one of the following amino acids at { TAIL ~ the position } indicated : 119N , 120L , and 121E. These phytases have an improved specific activity
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH