21 THR  H      30 LYS  O       1.80
 21 THR  N      30 LYS  O       1.80
 21 THR  O      30 LYS  H       1.80
 21 THR  O      30 LYS  N       1.80
 19 ASN  O      32 TYR  H       1.80
 19 ASN  O      32 TYR  N       1.80