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RNase protection analysis of F2 progeny of the Δεsil β-YAC transgenic mice. The locations of the protected fragments are shown to the left of each autoradiogram. The protected fragments sizes are human β, 205 bases; human γ, 170 bases; human ε, 188 bases; murine α, 128 base; and murine ζ, 151 bases. The days of gestation of the tissue samples are labeled above the autoradiogram, and the tissue sources are indicated above each lane (ys, yolk sac; fl, fetal liver; b, blood).
