An undulipodium or undulopodium (Greek: "swinging foot"; plural undulipodia), or a 9+2 organelle is a motile filamentous extracellular projection of eukaryotic cells. It is basically synonymous to flagella and cilia which are differing terms for similar molecular structures used on different types of cells, and usually correspond to different waveforms.
The name was coined to differentiate from the analogous structures present in prokaryotic cells.[1][2]
The usage of the term was early supported by Lynn Margulis, especially in support of endosymbiotic theory.[3] The eukaryotic cilia are structurally identical to eukaryotic flagella, although distinctions are sometimes made according to function and/or length.[4] The Gene Ontology database does not make a distinction between the two, referring to most undulipodia as "motile cilium", and to that in the sperm as sperm flagellum.[5]
^Hülsmann N (1992). "Undulipodium: End of a useless discussion". European Journal of Protistology. 28 (3): 253–257. doi:10.1016/S0932-4739(11)80231-2. PMID 23195228.
^Margulis L, Lovelock JE. "CP-2156 Life In The Universe: Atmospheres and Evolution". history.nasa.gov. Retrieved 8 July 2013.
^Sagan L (1967). "On the origin of mitosing cells". J Theor Biol. 14 (3): 255–274. doi:10.1016/0022-5193(67)90079-3. PMID 11541392.
An undulipodium or undulopodium (Greek: "swinging foot"; plural undulipodia), or a 9+2 organelle is a motile filamentous extracellular projection of eukaryotic...
blepharoplast) is a protein structure found at the base of a eukaryotic undulipodium (cilium or flagellum). The basal body was named by Theodor Wilhelm Engelmann...
protein Archaellum Cilium Ciliopathy Rotating locomotion in living systems Undulipodium Asai, Yukako; Kawagishi, Ikuro; Sockett, R. Elizabeth; Homma, Michio...
doi:10.1099/ijs.0.02587-0. PMID 14657097. Hülsmann N (August 1992). "Undulipodium: End of a useless discussion". European Journal of Protistology. 28 (3):...
evolutionarily distinct flagellum-like structure known as a cilium or undulipodium. Unlike bacterial flagella however, these structures do not rotate at...
protein Archaellum Cilium Ciliopathy Rotating locomotion in living systems Undulipodium Blair DF, Berg HC (February 1990). "The MotA protein of E. coli is a...
protein Archaellum Cilium Ciliopathy Rotating locomotion in living systems Undulipodium PDB: 2ZVZ; Kojima S, Imada K, Sakuma M, et al. (August 2009). "Stator...
protein Archaellum Cilium Ciliopathy Rotating locomotion in living systems Undulipodium Asai, Yukako; Kawagishi, Ikuro; Sockett, R. Elizabeth; Homma, Michio...
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