Developmental changes in the methylation silkmoth follicular epithelial messenger ribonucleic acid

As measured by the extent of incorporation of [3H]methyl groups into 5'-terminal m7GpppNm structures, the synthesis of poly(A+) mRNA progressively increased during follicular development, ultimately exceeding the prechorion value by 20-fold. Collectively, these results indicated that significant alterations in the methylation patterns of silkmoth mRNA accompany transitions in the types and amounts of mRNA expressed during follicular development.