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123456
Across
  1. 4. A reactant of an enzyme-catalyzed reaction.
  2. 5. A protein that acts as a biological catalyst
  3. 6. Energy needed to get a reaction started.
Down
  1. 1. A chemical substance formed as a result of a chemical reaction
  2. 2. The part of an enzyme or antibody where the chemical reaction occurs
  3. 3. A substance that speeds up the rate of a chemical reaction