sentence: Gene ontology puts the data into groups based on genes.
sentences_before: Many scientists have to send their information to the database. The PDB has the original or primary data. Hundreds of other databases reuse the data. These secondary databases organize the information in different ways. For example, both SCOP and CATH put structures into groups organized by type of structure and ideas about how they are related through evolution.
concept_name: gene ontology
headings: Protein Data Bank
categories: Chemistry Proteins