Permission is granted to copy this software provided that no fee is charged for it and that the copyright notice is not removed. Description CARD is a Turbo Pascal 5.0 graphical program developed to provide high-quality representations of nucleic acid secondary structures.
CARD allows to draw loops, bulges and helices in a user- friendly way.
So, if a sequence and its secondary structure features are known, step by step, a model can be assembled from its composing structure units. Each time a structure unit is added, the input of its characters is done manually. Text and numbers can be added to a drawing very easily. Several options are available to manipulate previously made drawings by copying, moving or deleting structures and by changing the characters of a structure. Since everything is menu-driven, CARD is easy to use.