anchor.diff:  ! AN is a list of all amino acid/carbohydrate names
   ! the order used here is used for the other data arrays below
   DATA AN/"ILE","PHE","VAL","LEU","TRP","MET","ALA","GLY", &
  -    "CYS","TYR","PRO","THR","SER","HIS","GLU","ASN","GLN","ASP", &
  -    "LYS","ARG","GLC","GAL","MAN","GLN","GAN","FUC","NEU"/
  +    "CYS","TYR","PRO","THR","SER","HIS","GLU","ASN", &
  +    "GLN","ASP","LYS","ARG","GLC","GAL","MAN","GLN", &
  +    "GAN","FUC","NEU"/
   
   ! The following arrays contain the amino acid residue volumes taken from the listed sources
   ! Units = 10^{-3} nm^3
  
positive.code: !    3 12.119/
  
  ! Values 'corrected' by SJP
  DATA BH/1.3948,4.1385,1.4781,1.3948,6.0345,1.7628,1.6447, &
      1.7280,2.3036,4.7189,2.2265,2.1418,2.2251,4.3974, &
      3.7615,3.4560,3.3727,3.8448,1.5864,3.4664,3.1506, &
      3.1506,3.1506,4.2982,4.2982,2.5702,6.9121/
      
  DATA BD/2.4361,5.1798,2.5194,2.4381,8.1171,2.8041,2.6860, &
      2.7693,3.3449,6.8015,2.2265,4.2244,4.3077,7.5213, &
      4.8028,6.5799,6.4966,4.8861,5.7516,9.7142,6.2745, &
      6.2745,6.2745,7.4221,7.4221,5.6941,12.1186/
      
  ! Number of exchangable hydrogens
  DATA NOEX/1,1,1,1,2,1,1,1,1,2,0,2,2,3,1,3,3,1,4,6,3,3,3, &
      3,3,3,5/
  ! Number of exchangable peptise hydrogens
  DATA NOPEEX/1,1,1,1,1,1,1,1,1,1,0,1,1,1,1,1,1,1,1,1,0,0,0, &
      0,0,0,0/
      
  ! Residue/sugar masses
  DATA WT/113.0,147.0,99.0,113.0,186.0,131.0,71.0,57.0,102.0, &
      163.0,97.0,101.0,87.0,137.0,129.0,114.0,128.0,115.0,128.0, &
      156.0,162.0,162.0,162.0,203.0,203.0,146.0,290.0/
      
  ! Number of electrons per residue/sugar
  DATA ELEC/62.0,78.0,54.0,62.0,98.0,70.0,38.0,30.0,53.0,86.0, &
      52.0,54.0,46.0,73.0,67.0,60.0,68.0,63.0,71.0,85.0,86.0, &
      86.0,86.0,108.0,108.0,78.0,153.0/
  
  ! Calculate scattering densities for H20 and D2O
  ! Sum of scattering lengths divided by the free water volume
  
negative.code: ! Cohn, E. J. & Edsall, J. T. (1943) in Proteins, amino acids and
  ! peptides, pp. 155-176 & 370-381, Reinhold Publ. Corp., New York.
  DATA AVCE/168.9,187.9,141.4,168.9,228.5,163.1,87.2,60.6, &
      106.7,192.1,122.4,117.4,91.0,152.4,141.4,117.4, &
      142.4,114.6,174.3,181.3,164.9,164.9,164.9,224.5, &
      224.5,164.3,281.2/
    
  ! Densitrometry
  ! Zamyatnin, A. A. (1972) Progr. Biophys. Mol. Biol. 24, 109-123.
  DATA  AVZ72/166.1,189.2,139.4,166.1,226.9,162.3,88.3,59.9, &
      108.1,192.9,122.2,115.7,88.6,152.5,137.8,117.3, & 
      143.3,110.6,167.9,172.7,162.7,162.2,161.9,216.6, &
      227.5,155.4,320.9/
  
  ! Densitrometry
  ! Zamyatnin, A. A. (1984) Annu. Rev. Biophys. Bioeng. 13, 145-165.    
  DATA AVZ84/164.6,187.2,136.8,164.6,225.1,161.0,86.4,57.8, &
      107.9,190.5,120.6,113.5,86.2,150.1,128.7,115.6, & 
      141.9,108.5,166.2,197.3,162.7,162.2,161.9,216.6, &
      227.5,155.4,320.9/
  
  ! Protein Crystal Structures
  ! Chothia, C. (1975) Nature (Lond.) 254, 304-308.
  DATA AVC/168.8,203.4,141.7,167.9,237.6,170.8,91.5,66.4, &
      105.6,203.6,129.3,122.1,99.1,167.3,155.1,135.2, &
      161.1,124.5,171.3,202.1,171.9,166.8,170.8,222.0, &
      232.9,160.8,326.3/
  
  ! Amino acid crystal structures [SJP1]
  DATA AVP/170.1,203.9,142.3,182.8,228.9,176.0,97.1,68.2, &
      112.4,202.3,129.0,129.0,103.3,158.3,148.0,127.4, &
      147.3,125.3,184.5,192.9,171.9,166.8,170.8,222.0, &
      232.9,160.8,326.3/
  
  ! Molar group summations (method B)
  ! Chothia, C. & Janin, J. (1975) Nature (Lond.) 256, 705-708.
  DATA AVR/173.8,182.5,147.3,173.8,236.6,173.7,92.1,62.5, &
      107.9,181.5,132.3,127.9,97.8,172.9,150.3,123.8, &
      150.3,123.8,187.8,198.8,167.3,167.3,163.3,230.4, &
      230.4,160.8,326.3/
  
  ! Consensus volume from the above 6 datasets [SJP 1]
  DATA AVS/166.1,189.7,138.8,168.0,227.9,165.2,87.8,59.9, &
      105.4,191.2,123.3,118.3,91.7,156.3,140.9,120.1, &
      145.1,115.4,172.7,188.2,171.9,166.8,170.8,222.0, &
      232.9,160.8,326.3/
      
  ! Amino acid/carboydrate scattering lengths ( (H)ydrogen and (D)ueterium)
  
  