Nucleic Acids Research, 1988, Vol. 16, No. 4 1295-1304
© 1988
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The histone H3 and H4 mRNAs are polyadenylated in maize
Institut de Biologic Moléculaire des Plantes 12 Rue du Général Zimmer, 67000 Strasbourg, France
Received December 1, 1987. Revised January 20, 1988. Accepted January 20, 1988.
Northern blot analysis revealed that the histone H3 and H4 mRNAs are of unusual large size in germinating maize embryos. S1-mapping experiments show that the 3'-untranslated regions of the mRNAs transcribed from 3 H3 and 2 H4 maize genes previously described are much longer than in the non-polyadenylated histone mRNAs which represent a major class in animals. Moreover, oligo d(T) cellulose fractionation of RNAs isolated at different developmental stages indicates that more than 99 % of the maize H3 and H4 mRNAs are polyadenylated. A putative polyadenylation signal is present in all five genes 17 to 27 nucleotides before the 3'-ends of the mRNAs.
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