Characterization of Hydrogen Bonds to Glu, pSer, pTyr, and sTyr in Experimental Protein Structures.

Columns report the percentage of hydrogen bonds to Glu, pSer, pTyr or sTyr, that are to a given donor residue, and for Arg in a single or bidentate orientation. Residues were drawn from all structures in the Protein Databank containing a pSer, pTyr, or sTyr residue. For Glu, residues were taken from the set of structures containing a pSer residue.