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Criteria for the formation of a salt bridge. A salt bridge is considered to be formed if the distance between any of the oxygen atoms of acidic residues and the nitrogen atoms of basic residues are within the cut-off distance (default 3.2 Angstroms) in at least one frame.The default distance cut-off can be changed by the user.he search can be restricted to a selection and/or a frame range given by the user. A salt bridge is considered to be formed if the distance between any of the oxygen atoms of acidic residues and the nitrogen atoms of basic residues are within the cut-off distance (default 3.2 Angstroms) in at least one frame.
Sodium nitrate belongs to the class of chemicals known as salts, similar to table salt, or sodium chloride. Sodium nitrate is also sometimes called Chile saltpeter, explains Edinformatics.com. At room temperature, sodium nitrate exists as a solid white substance that easily dissolves in water.