Abstract
Many plant pathogenesis-related (PR) proteins are allergenic. We isolated three cDNAs, Cry j 3.1, Cry j 3.2, and Cry j 3.3, that encoded homologs of Jun a 3, a PR protein allergen in Juniperus ashei, from a cDNA library derived from the pollen of Cryptomeria japonica. The predicted amino acid sequences encoded by the three cDNAs were more than 85% identical to each other and about 57% identical to the sequence of Jun a 3. The Cry j 3 genes seemed to form a small multigene family in the genome of C. japonica. Expression of Cry j 3 was strong in roots and in female and male strobili; expression was weaker in cotyledons, leaves, stems, and pollen grains.
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