Figure 3From: Structural and functional characterisation of the methionine adenosyltransferase from Thermococcus kodakarensis Activity assay of Tk MAT. Shown are HPLC traces (top to bottom) of: a) ATP reference; b) SAM reference; c) negative control (reaction without enzyme); d) Tk MAT assay. The additional peak in the SAM reference most likely derives from the counter ion present in commercial SAM preparations (p-toluenesulfonate salt).Back to article page