Analysis of TSA, TSB1, and TSB2 mRNAs in wild-type maize seedlings. Replicate blots contain 10, 7.5, 5, and 2.5 μg total RNA from the shoots of 10-day-old FRB73 maize seedlings and 20 pg of EcoRI-digested TSA (A and B), TSB1 (C and D), and TSB2 (E and F) cDNA clones. The blots were probed with the EcoRI insert from the TSA cDNA (A and B), TSB1 cDNA (C and D), and TSB2 cDNA (E and F), respectively.