Lamella (cell biology)

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For other uses, see Lamella (disambiguation).

A lamella (plural, lamellae), in cell biology, is used to describe numerous plate or disc-like structures at both a tissue and cellular level.

An example of this begin an extension of a thylakoid within a chloroplast, linking a thylakoid within one granum to one in another. They are the sites of photosystem I. Simply put, lamellae may be considered as a pair of membranes containing chlorophyll.

Chloroplasts are characterized by a system of membranes embedded in a hydrophobic proteinaceous matrix, or stroma. The basic unit of the membrane system is a flattened single vesicle called the thylakoid; thylakoids stack into grana (sing, granum). All the thylakoids of a granum are connected with each other, and the grana are connected by intergranal lamellae.[1]

It is placed between the two primary cell walls of two plant cells and made up of intracellular matrix. The lamella comprises a mixture of polygalacturons (D-galacturonic acid) and neutral carbohydrates. It is soluble in the pectinase enzyme.

A lamella, in cell biology, is also used to describe the leading edge of a motile cell, of which the lamellipodia is the most forward portion.

See also[edit]

References[edit]

  1. ^ Oxford Dictionary of Biochemistry and Molecular Biology, Oxford University Press

Further reading[edit]

Lipid lamellar, micellar and hexagonal phases: YashRoy R.C. (1990), Lamellar dispersion and phase separation of chloroplast membrane lipids by negative staining electron microscopy. Journal of Biosciences, vol. 15(2), pp. 93-98.