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. 1998 May 12;95(10):5655–5660. doi: 10.1073/pnas.95.10.5655

Figure 4.

Figure 4

ATR1 is a Myb-like transcription factor with three ORFs in its 5′ leader region. (A) Alignments of the predicted ATR1 amino acid sequence with Myb transcription factor homologues from Arabidopsis and maize. Sequences of ATR1, C1 (20), P (21), and GL1 (22) were aligned manually. Residues shared by at least three sequences are boxed. Positions of the two ATR1 introns are indicated by arrows. (B) The 5′ regulatory leader region of the ATR1 transcript. The nucleic acid sequence upstream of the ATR1 start codon in the longest ATR1 cDNA isolate is shown. All of 14 other cDNAs analyzed that include the entire ATR1 ORF ended within this sequence at least 15 bp 5′ of the first upstream ATG. Three out-of-frame upstream start codons are underlined, and the conserved Myb start codon is underlined and in bold. Predicted protein sequences encoded by each ORF are shown below the nucleic acid sequence. A 4-bp polymorphism present in the Col 5′ leader but absent in the Ler 5′ leader is shown in lowercase. A second 9-bp-length polymorphism internal to the coding sequence deletes from Ler the residues encoded at positions 134–136 (QTG) in Col.