JXB Advance Access originally published online on April 8, 2004
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Journal of Experimental Botany, Vol. 55, No. 399, pp. 1149-1152, May 1, 2004
© 2004 Oxford University Press
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Molecular characterization of OsRAD21-1, a rice homologue of yeast RAD21 essential for mitotic chromosome cohesion*
Received 18 August 2003; Accepted 1 February 2004

Key Laboratory of Photosynthesis and Environmental Molecular Physiology, Research Center for Molecular and Developmental Biology, Institute of Botany, The Chinese Academy of Sciences, Beijing 100093, China
* The nucleotide sequence data reported here will appear in the EMBL, GenBank and DDBJ nucleotide sequence database under the accession number AY288943.
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Rad21/Rec8 is an important component and key regulator of cohesins. A RAD21-like gene from rice (Oryza sativa L. ssp. japonica) has been cloned and termed OsRAD21-1. OsRAD21-1 is a single-copy gene in the rice genome and is expressed in the entire plant. OsRad21-1 consists of 1055 amino acid residues and is the largest of the Rad21/Rec8 family identified to date. Based on sequence similarity comparison with other members of this family and gene expression patterns, it is concluded that OsRad21 is a rice orthologue of yeast Rad21.
Key words: Chromosome cohesin, cohesion, meiosis, mitosis, rice.