AUXIN-BINDING PROTEIN1 (ABP1) Indoleacetic Acids Journal Article Plant Proteins Receptors, Cell Surface Research Support, Non-U.S. Gov't auxin-binding protein 1 early auxin-regulated genes gravitropism phototropism phytochrome 11121-56-5 136250-22-1 Arabidopsis Proteins Arabidopsis thaliana. DNA, Bacterial PHYA protein, Arabidopsis PHYB protein, Arabidopsis Phytochrome Phytochrome A Phytochrome B Research Support, N.I.H., Extramural Research Support, U.S. Gov't, Non-P.H.S. T-DNA abp1 mutants early light-regulated genes elongation hypocotyl elongation shade avoidance shade avoidance.