ClassName = Alphabet
    # The tco alphabet uses the cosine of the torsion angle
    # between adjacent carbonyl groups.  
    # The name comes from the DSSP column for the data.
    Name = tco
    IsNucleic = 0
    NormalChars = EFGH
    AllMatch = X
    CharName = E -1<=x<-0.625 	extended
    CharName = F -0.625<-x<0	neg
    CharName = G 0<=x<0.61	pos
    CharName = H 0.61<=x<1.0001 helix
EndClassName = Alphabet


ClassName = Alphabet
    # this is an obsolete name for the TCO alphabet,
    # kept only so that historical neural nets will still run
    Name = EFGH
    IsNucleic = 0
    NormalChars = EFGH
    AllMatch = X

EndClassName = Alphabet