{"data":{"id":"us/21-cfr-528.2000","jurisdiction":"us","citation":"21 CFR 528.2000","heading":"Deletion of exon 7 of CD163 gene in domestic pigs.","body":"(a) Specifications. Deletion of one (heterozygous) or two (homozygous) copies of exon 7 of CD163 gene1(abbreviated CD163ΔE7) in domestic pigs (Sus scrofa domesticus).\n(b) Sponsor. See No. 086205 in § 510.600(c) of this chapter.\n(c) Conditions of use—(1) Intended use. Deletion of exon 7 of the CD163 gene in domestic pigs (Sus scrofa domesticus) is intended to confer resistance to porcine reproductive and respiratory syndrome virus (PRRSV) in homozygous pigs. Pigs carrying one or two copies of CD163DE7, and their offspring, are intended for breeding or to be used as sources of food.","path":["Title 21—Food and Drugs","CHAPTER I—FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES","SUBCHAPTER E—ANIMAL DRUGS, FEEDS, AND RELATED PRODUCTS","PART 528—INTENTIONAL GENOMIC ALTERATIONS IN ANIMALS"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-21.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:24:47Z","sha256":"d8bc9e24b7b906cf9a3be2815f15b17eb42ca6d3d2e05819f166adb09c781bdb","source_id":"us-cfr","stale":true,"prev":"us/21-cfr-528.1092","next":"us/21-cfr-528.2001"},"notice":"GroundRules: Original legal text. Not legal advice."}