2.1.1.193 0.0007 - S-adenosyl-L-methionine pH 7.0, 37°C 706717 2.1.1.193 0.0013 - uracil1498 in 16S rRNA pH 7.0, 37°C, the Km-value for 16S rRNA is measured as a Km for the physiological substrate, 30S ribosomal subunit 706717