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Chitinase B mRNA Expression Is Highly Increased in ers1 etr1 Mutants.
Total RNA was isolated from rosette tissue of 3.5-week-old plants. Ten micrograms of total RNA was probed with a Chitinase B–specific probe. A ubiquitin-specific probe (UBQ10) was used as a loading control. Lanes with asterisks at top represent wild-type-looking siblings of the double mutants that were heterozygous for the ers1-2 allele and homozygous for the etr1-6 or etr1-7 allele. Col, Columbia wild type.
