In Proteins, young readers are introduced to proteins. A protein is a polymer—a long chain of atoms and molecules linked together. Protein polymers fold into different shapes, including coils and sheets. These shapes allow proteins to behave like tiny machines that do most of the jobs inside the body.
 
Softcover, 8×8 in., 24 pages
Word Count 254,  Lexile Measure 430L
A pronunciation guide is included. Reading Level 1-3, Interest Level 2-5.