Site-directed mutagenesis of Aspergillus niger NRRL 3135 phytase at residue 300 to enhance catalysis at pH 4.0

1. Mullaney, E.J.
2. Daly, C.B.
3. Kim, T.
4. Porres, J.M.
5. Lei, X.G.
6. Sethumadhavan, K.
7. Ullah, A.H.J