2.7.7.42 7.5 - assay at 2.7.7.42 7.5 - about, assay at 2.7.7.42 7.5 - activity assay 2.7.7.42 7.6 - - 2.7.7.42 7.6 - assay at 2.7.7.42 8 8.2 adenylylation