Transcribing and translating genes together is beneficial to the cell. In February 1828, Martin Harris arrived to assist Smith by transcribing his dictation. In eukaryotes, however, nucleosomes act as major barriers to transcribing polymerases during transcription elongation. A source of melodic ideas for improvisation is transcribing improvised solos from recordings. Naskh translates to "copying," as it became the standard for transcribing books and manuscripts. Overall, such systems reduce errors due to illegible writing on paper and transcribing errors. Context analysis is the method of transcribing observed behaviors on to a coding sheet. RNA polymerase is normally capable of transcribing DNA into single-stranded mRNA efficiently. He thus took the scholarly task of transcribing and preserving rural Armenian songs. RNA polymerase is free to continue transcribing the entire operon. Block began listening to old albums, transcribing them, and learning to play the songs. The work of transcribing his spoken word often placed a strain on his secretaries. In this situation, repression is that of RNA polymerase transcribing the genes in the operon. The Extended IPA has adopted bracket notation from conventions transcribing discourse. They also began work on transcribing the Mixtec languages into the Latin alphabet.