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BEAM - 304 : a platform of base editing therapeutics for patients with phenylketonuria FASEB Genome Engineering : Research and Applications July 9 , 2026 Michael Packer¹ , Bethany Winans¹ , Christopher Fincher¹ , Xiao Wang² , Dominique Leboeuf¹ , Jeremy Decker¹ , Adam Camblin¹ , Serena Moge¹ , Marlena Sorbello1 , Lei Johnson1 , Kelly Colletti¹ , Rodrigo Laureano¹ , Rebecca Ahrens - Nicklas² , Kiran Musunuru² , Gopi Shanker 1 Beam THERAPEUTICS