how the charges of those residues of protein(for example LYS) are determined in CHARMM topology file

From: yxiong_at_mail.ccnu.edu.cn
Date: Mon Dec 01 2003 - 04:27:52 CST

Dear sir,
  Would you like to tell me how to get the charges of carbamylated Lys-169 in
CHARMM force field:
     COOH
     |
 H2N-C-H
     |
    (CH2)4NHCO2
 
 Or Could you please tell me how the charges of those residues of protein(for
example LYS) are determined in CHARMM topology file ?

  Thanks a lot!

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