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The most significant words in corn (a) and in Arabidopsis (b) promoters. The analysis is performed on a subset of 5,200 corn promoters and 5,050 Arabidopsis promoters that have TSS predicted by at least four 5′ ESTs. For Corn, there is a prominent CA peak at the TSS and a smaller TATA motif at position -30. This is in sharp contrast to Arabidopsis where TATA is more frequent than CA
