Naphthylphthalamic acid-binding sites in cultured cells from Nicotiana tabacum

Abstract

Naphthylphthalamic acid (NPA), an inhibitor of polar auxin transport, binds with high affinity to membrane preparations from callus and cell suspension cultures derived from Nicotiana tabacum (K d approx. 2·10−9 M). The concentration of membrane-bound binding sites is higher in cell suspension than in callus cultures. The binding of NPA to these sites seems… (More)
DOI: 10.1007/BF00391027

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