Fimbria


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fimbria

[′fim·brē·ə]
(anatomy)

Fimbria

 

a long, thin, straight appendage of hydrophobic protein present in large numbers, sometimes as many as several thousand, on the cell surface of gram-negative bacteria. A fimbria measures as much as 12 micrometers in length and less than 100 angstroms in width. It is much finer and shorter than a flagellum. Male bacterial cells (donors) may have one to three sex fimbriae, or pili, that attach themselves to female cells (recipients) to form hollow bridges through which DNA may be transferred during bacterial conjugation. Fimbriae may be found in both motile and nonmotile bacteria. They usually originate from the basal granule in the cytoplasmatic membrane and pass to the exterior through the cell wall. Fimbriae enable a bacterial cell to adhere indiscriminately to solid surfaces of cells and tissues.

A. A. IMSHENETSKII

References in periodicals archive ?
Labro con leve recorte latero-apical, formando un proceso distal triangular (Pd), con fimbria larga y abundante (F).
Size and diet-related variation in enzymic activity and tissue composition in sablefish, Anoplopoma fimbria.
Esta caracteristica, unida a la variacion de fase, da lugar a una concentracion final de la fimbria por litro de medio cultivo inferior al resto de las cepas.
Hairs: yellowish brown (with orange hue in fresh specimens) on T2-T6 and on metasomal sterna; prepygidial fimbria orange.
El 26% (26/ 100) de los aislamientos de las AIE expresaron antigenos solamente contra la fimbria F41, donde 19.
The seventh and eighth quatrains continue the poet's praise for Manolete, describing him as, "o que melhor calculava / o fluido aceiro da vida, / o que com mais precisao / rocava a morte em sua fimbria.
Three types were noted: in one, fimbria arise from the surface of the spore; the second is similar but some fimbria extend high above the spore; the third is the unique rock-outcrop form.