             RELEASE NOTES (Beta Version IT5.4)

This beta version of 'rna_2d3d' differs from that of 'IT5.3'
primarily in how RNA tecto structures are modeled.   Instead
of  using  four  additional model arrays (C,D,E and F), only
the C array is used.  The model C  array  contains  all  the
monomers  of a proposed RNA tecto structure whose definition
is specified via a monomer pairing file.  Invocation of this
file  automatically  results  in  the 3D construction of the
structure.  This is analogous to the  invocation  of  a  BPL
file which automatically results in the construction of a 2D
and 3D version of the primary structure of  an  RNA  monomer
defined  by a BPL file. The user is thus relieved of several
awkward interactive construction steps required in the  pre-
vious version.

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