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In addition, understanding the genetic regulation of this process may enable bovine improvement. While many bovine QTL have been reported, few of the causative genes and mutations have been identified. We discovered a QTL for milk \u03b2-carotene and subsequently identified a premature stop codon in bovine \u03b2-carotene oxygenase 2 (BCO2), which also affects serum \u03b2-carotene content. The BCO2 enzyme is thereby identified as a key regulator of \u03b2-carotene metabolism.<\/jats:p>","DOI":"10.1534\/genetics.109.101741","type":"journal-article","created":{"date-parts":[[2009,4,28]],"date-time":"2009-04-28T02:05:44Z","timestamp":1240884344000},"page":"923-926","source":"Crossref","is-referenced-by-count":101,"title":["Mutation in Bovine \u03b2-Carotene Oxygenase 2 Affects Milk Color"],"prefix":"10.1093","volume":"182","author":[{"given":"S D","family":"Berry","sequence":"first","affiliation":[{"name":"ViaLactia Biosciences, P.O. 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