Abstract: Methods of increasing production, stability or activity of a target polypeptide are provided herein. The method includes increasing the level of an antioxidant in a cell comprising a polynucleotide encoding the target polypeptide. Also provided are cells and transgenic organisms produced using the methods described herein. Methods of treating a subject with a condition treatable by administration of the target polypeptide are also disclosed. Finally methods and compositions for transiently increasing antioxidants in plant cells are provided.

Abstract: The invention is a plant-based production of biologically active avian interleukin-12 protein and functional units for increasing the protective and/or immunological response in an animal, for use as an adjuvant with a vaccine to control avian infectious diseases, and methods of producing and using the same. Specifically, avian interleukin-12 was produced from a plant-based expression system and demonstrated that it stimulates production of immune responses in birds.

Abstract: Methods of increasing production, stability or activity of a target polypeptide are provided herein. The method includes increasing the level of an antioxidant in a cell comprising a polynucleotide encoding the target polypeptide. Also provided are cells and transgenic organisms produced using the methods described herein. Methods of treating a subject with a condition treatable by administration of the target polypeptide are also disclosed. Finally methods and compositions for transiently increasing antioxidants in plant cells are provided.

Abstract: A method of preparing molecules of interest for delivery to eukaryotic cells is shown, wherein a ricin B chain subunit not having a ribosome inactivating subunit and retaining lectin activity is modified by modifying the first cysteine residue to be absent or substituted with an amino acid other than cysteine, or removing a protease sensitive site at the N-terminal of the subunit, or adding an endoplasmic reticulum retrieval signal, and operatively associating the subunit with a molecule of interest. Methods of operatively associating the subunit and molecule of interest include chemical conjugation at primary amines, conjugation with N-glycans of the subunit, a disulfide bond, and assembly of immunoglobulin domains. The invention provides for operatively associating multiple molecules of interest with a ricin B chain subunit, and delivery into targeted cells, cell components, and combination of cells.