Galacturonic acid is still very similar to glucose, except one of the carbons has a -COOH group attached instead of a CH2-OH. ... What holds enzymes together in the first place: Enzymes are proteins and proteins are constructed from chains of amino acids (20 possible different ones). ... Only the folded structure forms the catalytic or active site. However this folded structure will generally be held together by non-covalent interactions unlike the covalent bonds that hold the amino acid links together. ... Enzymes that do well at very high temperatures tend to have a more rigid, inflexible st...

• Word Count: 530
• Approx Pages: 2
• Grade Level: Undergraduate

In the average American diet, 93% of their vitamin C comes from fruits and vegetables and citrus fruits and tomatoes contribute to almost half of the vitamin C provided by the fruits and vegetable group. ... Collagen is a protein that gives structure to bones, cartilage, muscle and blood vessels. ... Vitamin C is active inside of the cell, where it adds hydrogen and oxygen to two amino acids, proline and lysine. ...

• Word Count: 849
• Approx Pages: 3
• Grade Level: High School