This chapter provides guidance on the practices and procedures pertaining to the rules for deposits of biological materials for patent purposes (37 CFR 1.801 - 1.809 ) and the rules for the requirements for patent applications containing nucleotide sequence and/or amino acid sequence disclosures under World Intellectual Property Organization (WIPO) Standard ST.25 (37 CFR 1.821 - 1.825 ) and WIPO Standard ST.26 (37 CFR 1.831 - 1.835 ).