| abstract |
An isolated, synthetic or recombinant phytase that has both an improved thermal tolerance and greater gastric lability compared to SEQ ID NO: 2; where phytase is a polypeptide that has an amino acid sequence that has a sequence identity of at least 95%, 96%, 97%, 98% or 99% with, or that has the amino acid sequence of, SEQ ID No : 2 and at least one mutation selected from: I427T, A232P, A236H, A236T, A274I, A274L, G257A, G67A, H263P, I174P, L157P, L167S, L296T, L50W, M51L, P149L, P217D, P217G, P217G, P217G, P217G, P217G, P217G, P217G P343L, P343N, P343R, P343V, Q246W, Q275H, Q377R, S211H, S218Y, T291V, T48F, T48H, T48I, T48K, T48L, T48M, T48W, T48Y, Y79H, Y79N and Y79S |