Human platelets contain gelsolin. A regulator of actin filament length.

@article{Lind1982HumanPC,
  title={Human platelets contain gelsolin. A regulator of actin filament length.},
  author={Stuart E. Lind and Helen L. Yin and Thomas Peter Stossel},
  journal={The Journal of clinical investigation},
  year={1982},
  volume={69 6},
  pages={1384-7}
}
Morphologic and biochemical studies suggest that actin in human platelets polymerizes in response to various stimuli and that shortening of actin filaments can be regulated by calcium. We report that human platelets contain gelsolin, a protein of Mr 91,000 that binds reversibly to actin in the presence of calcium. Platelet gelsolin exhibits immunologic crossreactivity with rabbit macrophage gelsolin and shortens actin filaments as demonstrated by viscosity measurements and gel point… CONTINUE READING