Preferred provider organization
In health insurance in the United States, a preferred provider organization (PPO), sometimes referred to as a participating provider organization or preferred provider option, is a managed care organization of medical doctors, hospitals, and other health care providers who have agreed with an insurer or a third-party administrator to provide health care at reduced rates to the insurer's or administrator's clients.
Aureusidin synthase
Aureusidin synthase is homologous to plant polyphenol oxidase (PPO), but contains certain significant modifications. While PPO has a highly conserved N-terminal amino acid sequence in order to facilitate transport to the plastid lumen, aureusidin synthase lacks this sequence and thus is not localized to the plasmid. Much like PPOs, aureusidin synthase is likely first synthesized as a larger ~60 kDa protein and then undergoes proteolytic cleavage to remove transport groups.