One of these substances called TE additionally chelates magnesium ions, making it ideal for (15[1])storing (15[2])DNA. (15[1])Britton and Robinson name a “universal” one of these substances. (15[1]-5[1])Citrate and phosphate are found in one (15[1])of these (15[2])substances named for (15[1])McIlvaine, which is mixed with glycerol to create mounting medium. CAPS, MOPS, and HEPES are three in a series of twenty of these agents used in biology named (15[1])for Norman (10[1])(*) Good, most of (10[1])which (10[1])are zwitterionic compounds. The bicarbonate system in blood acts as one of (10[1])these (10[3])agents. The capacity of these agents is highest when their pH (10[1])equals their pKa, which is a consequence of the Henderson-Hasselbalch equation. For 10 points, name these solutions that usually consist of an acid and its conjugate base to keep pH (10[1])constant. ■END■