Effects of Δy14, Δmago, Δcbp20, and Δcbp80, and correction of these mutants, on the stability of selected mRNAs. (A) Aliquots (3 μg) of total RNA extracted from wt, Δy14, Δy14 y14-Barr, Δmago, and Δmago mago[Barr] were separated on formaldehyde denaturing gels and analyzed as described in Figure 1B with the indicated probes. 4TU RNA from wt, Δy14, Δy14 y14[Barr], Δmago, Δmago mago[Barr] (B) or wt, Δcbp20, Δcbp20 cbp20[Barr], Δcbp80, Δcbp80 cbp80[Barr] (C) was analyzed by pulse–chase for arg-2, eif5, eif4a3, erf1, and cox-5 mRNAs using the procedures described in Figure 2. See also Figure S6.