These rules must be followed in pdb files, ligand files, and inputfiles (* = wildcard)

residuetypes:
	avoid the following:
		any of the residuetypes in the natural protein aa resparam file
		END - acts as endflag for pdbATOM arrays
		*TE, *TN - reserved for N- and C- termini	(* = wildcard)
		zzz - acts as endflag for resparam and rotamerlib
		PS* - pseudosidechain
		UU* - pseudosidechain
atomnames:
	avoid the following:
		N, HN, H, 1H, 2H, 3H, HA, 1HA, 2HA, CA, CB, C, O, OT, OXT - reserved for backbone atoms: 
		zzz - acts as endflag
		PS* - pseudosidechain atom
atomtypes:
	avoid the following:
		U, BHY, *BK, PSE* - reserved for pseudoatoms
chain identifier:
	avoid the following:
		l - reserved for free-moving ligands
one_letter_codes:
	avoid the following:
		any of the one_letter_codes in the natural protein aa resparam file
		z - endflag
		U - pseudoresidue
		O - pseudoresidue
		numbers or non-alphabetical characters
	permitted:
		a,B,b,f,g,i,J,j,l,m,n,o,p,q,r,s,t,v,w

residuecodes:
	avoid the following:
		any of the residuecodes in the natural protein aa resparam file
		>=100 reserved for terminii
	permitted:
		30-99

summary of types used in resparam (do not use these for ligands):
order: residuetype, one_letter_code, residuecode
ALA     A       1
ARG     R       2
ASN     N       3
ASP     D       4
GLN     Q       5
GLU     E       6
CYS     C       7
GLY     G       8
HIS     H       9
ILE     I       11
LEU     L       12
LYS     K       13
MET     M       14
PHE     F       15
PRO     P       16
SER     S       17
THR     T       18
TRP     W       19
TYR     Y       20
VAL     V       21
CYD     c       22
UUL     O       23
UUU     U       24
AUU     u       25
CTE     1CC     100
NTE     3NN     101
CTN     2cc     102
NTN     4nn     103
MEA     5m      105
TYC     y       -20
LYN     k       -13
HIN     h       -9
GLH     e       -6
ASH     d       -4