| Abstract: | The interaction of representatives of three classes of phytohormones, abscisic acid (ABA), the synthetic auxin 1-NAA, and the synthetic cytokinin 6-BAP, with ABA-binding cotton protein was studied. Binding of ABA with its protein was shown to be specific and receptor-like. Competitive protein binding showed that 1-NAA (15±3%), 6-BAP (82±3%), and ABA (95±3%) replace3H-ABA from the protein complex. The possibility of reacting ABA-binding protein with various classes of intracellular phytohormones is discussed.Institute of Genetics and Experimental Biology of Plants, Academy of Sciences of the Republic of Uzbekistan, Tashkent, fax (99871) 64 22 30. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 252–253, May–June, 2000. |
