“…Chemicals. Radioactively labeled sulfate esters were prepared from 35S-labeled sulfuric acid (98%) or chlorosulfonic acid (Radiochemical Centre, Amersham, Bucks., U.K.) by the following methods: choline [35S]sulfate, 13.6 ,tCi/mg (29); dipotassium 2hydroxy-5-nitrophenyl [35S]sulfate, 10.8 ,.Ci/mg (15); potassium dodecyl [35S]sulfate, 18.1 /Ci/mg (2); potassium p-nitrophenyl [U5S]sulfate, 13.1 ,zCi/mg (11); potassium glucose [6-35S]sulfate, 10 ,uCi/ mg (24); potassium phenyl [35S]sulfate, 15.8 ,tCi/ mg (19); potassium L-tyrosine O-L35S]sulfate, 3.7 ,mCi/ mg (6). Potassium tyrosylglycine 0-[V5S]sulfate (3.12 ,Ci/mg) was prepared by the method employed for L-tyrosine 0-sulfate but substituting equimolar quantities of tyrosylglycine for L-tyrosine.…”