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Table 3 Percentage with which the various types of protein atoms are found in the first coordination sphere of chloride anions, for various coordination numbers (CN)

From: Buried chloride stereochemistry in the Protein Data Bank

Atom CN?=?2 CN?=?3 CN?=?4 CN?=?5 CN?=?6
Main-chain N-H 47.0 39.0 35.2 33.6 27.6
Other N-H 13.6 16.7 14.6 8.6 12.5
N charged 19.7 18.9 22.3 15.5 17.2
Main-chain O 1.5 3.5 3.6 8.6 9.5
O-H 10.6 15.0 15.5 12.1 5.8
C?=?O 3.0 2.6 0.9 2.6 3.8
Charged O 0.0 0.0 0.7 1.3 1.9
Main-chain C 0.0 0.3 0.7 2.6 1.0
CA 0.0 0.0 1.8 4.7 3.8
CB 0.0 1.3 1.1 4.3 6.7
Other C 4.5 2.4 3.5 5.5 9.6
S 0.0 0.3 0.2 0.0 1.0