GRSDB: ‘G’-Rich Sequences DataBase contains information on composition and distribution of putative Quadruplex forming 'G'-Rich Sequences (QGRS) in the alternatively processed (alternatively spliced or alternatively polyadenylated) mammalian pre-mRNA sequences. The data stored in the GRSDB is based on computational analysis of genomic nucleotide sequences obtained from fully annotated GenBank/RefSeq entries that provide alternative processing information. In addition to providing data on composition and locations of QGRS relative to the processing sites in the pre-mRNA sequence, GRSDB features visual comparison of QGRS distribution patterns among all the alternative RNA products of a gene with the help of dynamically generated graphics. . GRSDB can be accessed at http://bioinformatics.ramapo.edu/grsdb/.
rna sequence structure nucleic acid structure