Arabidopsis Proteins Journal Article AUXIN BINDING PROTEIN 1 (ABP1) Auxin Auxin signaling Boundary genes Indoleacetic Acids Intracellular Signaling Peptides and Proteins Peptides Plant Growth Regulators Plant Proteins Plant development Protein Sorting Signals Receptors, Cell Surface Research Support, Non-U.S. Gov't TAX1 protein, Arabidopsis auxin-binding protein 1 cysteine-rich peptide fruit development lateral organ fusion paraclade junction.