Uridine, inosine, adenosine, and thymidine were methylated selectively at the base moieties by the use of trimethylphosphate or dimethyl sulfate in the presence of boric acid. A suppressing effect of boric acid on the methylation of the ribose-hydroxyl groups was discussed briefly.
Heterologous UTR sequences for enhanced mRNA expression
申请人:ModernaTX, Inc.
公开号:US11389546B2
公开(公告)日:2022-07-19
mRNAs containing an exogenous open reading frame (ORF) flanked by a 5′ untranslated region (UTR) and a 3′ UTR is provided, wherein the 5′ and 3′ UTRs are derived from a naturally abundant mRNA in a tissue. Also provided are methods for identifying the 5′ and 3′ UTRs, and methods for making and using the mRNAs.