16 atom (D) Atom Parameters

Packet Size - Variable

IDN Description
1-3 x, y, z parameters in fractions of unit cell
4 individual isotropic thermal parameter U
5-10 anisotropic thermal parameters U11, U22, U33, U12, U13, U23
11 population parameter
12 anomalous population parameter
13 neutron scattering factor
14 atom label (24 characters)
15 residue code (4 characters)
  char 1: remoteness indicator
  char 2: branch designator
  char 3: sub-branch designator
  char 4: alternate location indicator
16 sequence code (4 characters)
  chars 1-3: least significant digits of residue sequence number
  char 4: residue code
17 data set number
18 chain code (4 characters)
  chars 1-3: chain identifier
  char 4: most significant digit of residue sequence number
19 residue name (4 characters)
20 atom serial number for Protein Data Bank
21 atom multiplicity for atoms in special positions
22 scattering factor pointer as a packet sequence number of scat
23 thermal displacement parameter type (0=overall;1=iso; 2=aniso)
24 atom-group key for group refinements
25 model-refinement key for refining different model
26 number of valence electrons - added in MAPXCH
50 specified coordinates flag (0=no; 1= geometry fixed; 2=dummy)
51 atom label of attached atom (for geometry fixed hydrogen sites)
52 number of attached hydrogen atoms not present in atom record
55 refinement restrictions associated with this site (8 characters).
  String may be made up of the following flags:
  Sspecial position constraint
  Grigid group refinement
  Rriding atom site attached to non-riding atom site
  Ddistance or angle restraint
  Tthermal displacement constraint
  UUiso or Uij restraint due to rigid body
  Ppartial occupancy restraint
56 special information about this site (40 characters)
57 description of constraints to site parameters (40 characters)
58 description of restraints to site parameters (40 characters)
61-70 C111,C112,C122,C113,C123,C133,C222,C223,C233,C333,from Valray/MAPXCH
71-70 D1111,D1112,D1122,D1113,D1123,D1133,D1222,D1223,D1233,D1333,D2222,D2223,D2233,D2333,D3333
101-103 sigma x, sigma y, sigma z
104 sigma Uiso
105-110 sigma of U11, U22, U33, U12, U13, U23
111 sigma of population parameter
112 sigma of anomolous population parameter
113 sigma of neutron scattering
161-170 sigma on C111,C112,C122,C113,C123,C133,C222,C223,C233,C333 from Valray/MAPXCH
171-170 D1111,D1112,D1122,D1113,D1123,D1133,D1222,D1223,D1233,D1333,D2222,D2223,D2233,D2333,D3333
210 atom number in dictionary dict
212 pointer to atom number in atom of the back chain
213 pointer to atom number in atom of the furthest forward chain
214 mobility indicator
215 KEY for group/non-group/slave
300 6-char code for geometric constraint (same as CALCAT)
301 Bond distance to parent atom site
302 Alpha 1
303 Alpha 2
310 24-char label of sites used in the geometric constraint
311 Encoded symop/translation (if not 1 555)
312-317 as for 310 and 311 for three additional site specifiers
320-323 24-char label of sites in the same rigid group (eg. methyl)
401 electron population of core (from Valray)
402 electron population of pseudo-core/pseudo-valence shell (from Valray)
403 electron population of valence shell monopole (from Valray)
404 no idea. but it looks important
405 \kappa0 radial expansion coefficient for monopole
406 \alpha0 radial exponent for monopole
407 \alpha1 radial coefficient for dipole
408 \kappa1 expansion coefficient for dipole
... etc.
501-503 multipole coefficients Y11,Y1-1,Y10
504-508 multipole coefficients Y22,Y2-2,Y21,Y2-1,Y20
509-515 multipole coefficients Y33,Y3-3,Y32,Y3-2,Y31,Y3-1,Y30
... etc.