text: Along with a phosphate, this ion coordinates adenosine in a compound used to make ATP duringpyrosequencing.
full_question: Along with a phosphate, this ion coordinates adenosine in a compound used to make ATP duringpyrosequencing. Its ammonium salt is used to salt out proteins. The proteoglycans heparan and chondroitinare found bound to this anion. This ion is the hydrophilic group in a lysing agent added before polyacrylamidegel electrophoresis. In that case, it's coordinated to a sodium dodecyl cation. Barium precipitates out this ion,whose anhydrous magnesium form is an ubiquitous drying agent. Gypsum is the calcium salt of this anion,and its monoprotic and diprotic acids are both strong. For 10 points, name this oxide of sulfur VI (six), adivalent anion with formula SO4 two minus.
first_sentence: Along with a phosphate, this ion coordinates adenosine in a compound used to make ATP duringpyrosequencing.
raw_answer:  sulfate [or SO4 2 minus until it is read; do not accept or prompt on "sulfite" or "bisulfate"] 