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Zinc-containing alkaline phosphatase (1alk) from Escherichia coli and the iron-containing purple acid phosphatase (1qhw) from Rattus norvegicus

• What structural elements are present?
• What is the subunit composition of the proteins?
• What are the major features of the active sites?

Kim, E. E., Wyckoff, H. W. 1991. Reaction mechanism of alkaline phosphatase based on crystal structures. Two-metal ion catalysis. J. Mol. Biol. 218:449-464.

Lindqvist, Y., E. Johansson, H. Kaija, P. Vihko, and G. Schneider. 1999. Three-dimensional structure of a mammalian purple acid phosphatase at 2.2 Å resolution with a µ-(hydr)oxo bridged di-iron center J. Mol. Biol. 291:135-147.

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