VTUTIN: A full screen gel management editor

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Abstract
Large DNA sequences are now routinely sequenced by the cloning of randomly generated fragments into single-stranded DNA phage vectors (the ‘shotgun’ method). Various programs exist for computerized assembly of such fragments, including the phases of data entry, homology searching and gel-management/editing. Many gel-management editors are rudimentary in nature, using either line-editing techniques or using unnatural displays or command systems. Others are available only on restricted types of computer system. The program VTUTIN makes full screen editing along the lines of modern text editors available for the complex data type of sets of sequence gels and their consensus. Not only are the data displayed on the VDU screen in a natural manner, but VTUTIN has also been written to model the command system of a well-established text editor (PDP-ll KED or VAX/VMS EDT) to simplify editor use and learning. VTUTIN has been written in Pascal in a modular form so that wide-spread portability is facilitated. VTUTIN is currently implemented to work on VT-100 type terminals although the modularity of the code should allow straightforward conversion for other terminal types and should also permit simple alteration to model any other text editor.