Flagellar radial spokes contain a Ca2+-stimulated nucleoside diphosphate kinase

The radial spokes are required for Ca(2+)-initiated intraflagellar signaling, resulting in modulation of inner and outer arm dynein activity. However, the mechanochemical properties of this signaling pathway remain unknown. Here, we describe a novel nucleoside diphosphate kinase (NDK) from the Chlam...

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