wwPDB validation report of PDB entry 1UD5

the structure which sodium ions, instead of calcium ions, are used to retain the structure and function of AmyK38.

The structure of the N289H mutant of AmyK38.

The structure of the calcium-free alpha-amylase, AmyK38, from the crystal grown in the CaCl2 containing solution.

This structure was determined from the dataset of the crystal soaked into K+ ion containing solution.

This structure was determined from the dataset of the crystal soaked into Li+ ion containing solution.

Crystal structure of AmyK38 with rubidium ion

geometric validation package for ligand chemistry in protein x-ray structures

20191225.v01 (using entries in the PDB archive December 25th 2019)