References

1.  Barton, G. J. (1993), 
	"ALSCRIPT A tool to format multiple sequence alignments",
	Protein Engineering,  Volume 6, No. 1, pp.37-40.

2.  Barton, G. J. (1990),
    	"Protein Multiple Sequence Alignment and Flexible Pattern Matching",
	Methods in Enzymology,
    	183,403-428.

3.  Barton, G. J. and Sternberg, M. J. E. (1987),
    	"A Strategy for the Rapid Multiple Alignment of Protein Sequences: 
         Confidence Levels From Tertiary Structure Comparisons",
	Journal of Molecular Biology,
    	198,327-337

4. Higgins, D. G. and Sharp, P. M. (1989),
    	"Fast and sensitive multiple sequence alignments on a microcomputer",
	CABIOS,
    	5,151--153

5. Devereux, J. Haeberli, P. Smithies, O. (1984),
    	"A comprehensive set of sequence analysis programs for the VAX",
	Nucleic Acids Res.
    	12, 387-395

6. Livingstone, C. D. and Barton, G. J. (1993),
	"Protein Sequence Alignments:  A Strategy for the Hierarchical analysis
	of residue conservation"
	Computer Applications in the Biosciences,
	9, 745-756.