We want to measure protein synthesis and degradation in live cultured tissue or cell samples and also zebrafish larvae (mg quantities) using tritiated water (as one can with D2O in MS). I have done this with S35-met in retic lysates in the 1980s, but I am sure things have moved on in terms of LSCs, scintillants, solvation etc. Can anyone recommend a simple protocol, or where to start looking?