Bacteriochlorophylls

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green pigments produced by photosynthetic purple and green bacteria. They are localized in the chromatophores of the bacterial cell. Most of the purple bacteria contain bacteriochlorophyll a (bacterio-chlorin), which is similar to chlorophyll a of green plants. Certain purple bacteria contain bacteriochlorophyll b. Green bacteria contain bacteriochlorophyll c or bacteriochlorophyll d (bacterioviridins), which differ significantly in structure from other chlorophylls. Every bacteriochlorophyll has its characteristic absorption spectrum. For example, bacteriochlorophyll a has its main absorption maximum at a wave length of 780 nanometers (nm); bacteriochlorophyll b, at 799 nm; bacteriochlorophyll c, at 660 nm; and bacteriochlorophyll d, at 650 nm.

REFERENCES

Kondrat’eva, E. M. Fotosinteziruiushchie bakterii. Moscow, 1963.
Uspenskaia, V. E. “Biosintez bakterial’nykh khlorofillov.” In Uspekhi mikrobiologii, vol. 3. Moscow, 1966.

V. M. GORLENKO

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