the structure of the shrunken gene of zea mays encoding sucrose synthase ( ec 2.4.1.13 ) was determined by ( i ) sequencing the transcription unit and 1.2 kb of 5 ' -upstream sequences from a genomic clone , ( ii ) by sequencing a nearly full length cdna clone and ( iii ) by determining the transcription start site by a combination of primer extension experiments with synthetic oligodeoxynucleotide primers and s1 mapping .
C1517495
structure
C0040649
transcription