purified influenza viral cores catalyze the entire process of viral rna transcription , which includes the endonucleolytic cleavage of heterologous rnas containing cap 1 ( m ( 7 ) gpppnm ) structures to generate capped primers 10-13 nucleotides long , the initiation of transcription via the incorporation of a guanosine residue onto the primers , and elongation of the viral mrnas [ plotch , s. j. , bouloy , m. , ulmanen , l & krug , r. m. ( 1980 ) cell 23 , 847-858 ] .
C0040649
transcription
C1158830
initiation