Completion of rice genome sequencing has necessitated identification of transcripts encoded by the genome and their corresponding functions. In the present study we have catalogued cytoplasmic ribosomal protein complement of rice genome corresponding to 68 families. Mining TIGR (The Institute for Genomic Research) rice database and unigene sequences available from National Centre for Biotechnology Information (NCBI) produced a non-redundant set of these sequences. This resulted in identification of 209 candidate r-proteins of which 22 have not been reported previously. The number of genes per family ranges from 1 to 8 distributed throughout the genome with maximum occurrence at chromosome 7. Mapping of r-proteins on BAC clones revealed several small clusters of genes. Unigene sequences correspondtng to most of the reported r-proteins were identified indicating these genes are being expressed.
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