nolvadex vs arimidex bodybuilding The primers used to change UGT1A8 codon 173 from Ala to Gly were as follows sense, 5 TTTAACTTATTTT T TTCGCATTGCAGGAG 3, and antisense, 5 CTCCTGCAATGCGAA A AAAATAAGTTAAA 3, corresponding to nucleotides 349 to 377 relative to the translation start site