sentence: Proteins are large and complex molecules made of smaller pieces called amino acids.
sentences_after: Proteins can be studied by gel electrophoresis in two ways. One way is to take a mixture of proteins and separate them in the gel. The other way is to breakdown a single protein into smaller pieces. The smaller pieces can then be separated in the gel.
concept_name: protein
headings: Gel electrophoresis Applications Protein separation
categories: Chemistry Biochemistry