The Molecular Weights of Phycocyan and of Phycoerythrin. Iii

Svedberg, The; Eriksson, Inga-Britta

doi:10.1021/ja01349a027

Cited by 31 publications

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“…The crystalline Bphycoery thrin was judged to be homogeneous from the fact that only one schlieren peak was observed and the absorption boundary of the pigment corresponds almost exactly with it. It may also be noted that Svedberg and Eriksson (1932) determined the molecular weight of what they designated native R-phycoerythrin from Ceramiwn and found it to be similar to the crystalline phycoerythrin from this species.…”

Section: Ultracentrifugationmentioning

confidence: 92%

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A New Phycoerythrin From Porphyra Naiadum

Airth¹,

Blinks²

1956

The Biological Bulletin

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Svedberg and Katsurai (1929) proposed a phylogenetic nomenclatural system for the classification of the phycobilin pigments of the algae. They designated the phycoerythrin and phycocyanin from the red algae as R-phycoerythrin and Rphycocyanin, respectively, and the corresponding pigments from the blue-green algae as C-phycoerythrin and C-phycocyanin. In general, these pigments exhibit the following absorption maxima : Approximate absorption maxima Pigment m/< R-phycoerythrin 495 540 560 C-phycoerythrin 550 R-phycocyanin 550 615 C-phycocyanin 615This system has proved inadequate in several instances (Kylin, 1912;Lemberg, 1930;Kylin, 1940; Haxo, ct a!., 1955) in that phycobilin pigments other than the above types, as judged from their absorption spectra, have been isolated. In spite of the apparent shortcomings of the Svedberg and Katsurai system of classification, no new system has been proposed. A new phycoerythrin has now been isolated from Porphyra naiadum and it is proposed that this pigment be called B-phycoerythrin (tentatively so designated by Blinks, 1954). This differs from known phycoerythrins in having two absorption peaks, at 545 and 565 nip.. The isolation, purification and some properties of this pigment will be discussed. SOURCEPorphyra naiadum Anderson is a member of the most primitive red algal order, the Bangiales. There is now some question as to whether it belongs in the genus Porphyra, since its life cycle is different. This is currently under study by Prof.G. J. Hollenberg ; pending his description of a new genus, we must use the current name. The thallus is one cell thick, extremely delicate, and yields its pigment readily into fresh water in a few hours. It is found growing only upon a marine flowering plant, Phyllospadi.v.

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Section: Ultracentrifugationmentioning

confidence: 92%

“…Svedberg and his collaborators determined the molecular weight of crystalline phycoerythrin from several species of red algae (Svedberg and Lewis, 1928;Svedberg and Katsurai, 1929;Svedberg and Eriksson, 1932) a Spinco ultracentrifuge and found to be 12.0. This value is comparable to that found by Eriksson-Quensel (1938).…”

Section: Ultracentrifugationmentioning

confidence: 99%

A New Phycoerythrin From Porphyra Naiadum

Airth¹,

Blinks²

1956

The Biological Bulletin

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“…Although generally obtained as high molecular mass complexes ranging from approximately 100,000 to 208,000 daltons, T. Svedberg and co-workers (Svedberg and Lewis 1928;Svedberg and Katsurai 1929;Svedberg and Eriksson 1932) found the minimum assembly unit of phycocyanins and phycoerythrins to be about 34,700 daltons at alkaline pH. In the 1970s, smaller and more precise values emerged from further studies of the physico-chemical properties of these phycobiliproteins.…”

Section: Structural Units Of the Phycobiliproteinsmentioning

confidence: 99%

Phycobiliproteins and phycobilisomes: the early observations

Marsac

2005

Discoveries in Photosynthesis

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The purpose of this minireview is to highlight the early observations that led to the discovery of the physicochemical properties of the phycobiliproteins, their structure and function, and to their architectural organization in supramolecular complexes, the phycobilisomes. Generally attached on the stromal surface of the thylakoid membranes in both prokaryotic (cyanobacteria) and eukaryotic cells (cyanelles, red algae and cryptomonads), these complexes represent the most abundant soluble proteins and the major light-harvesting antennae for photosynthesis. This review mainly focuses on the years prior to the development of the molecular biology of cyanobacteria that flourished in the 1980s. We refer the reader to the comprehensive and excellent review by Sidler (1994) for more recent discoveries and more detailed literature on this topic.

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“…Sedimentation velocity measurements were made using the light adsorption method, a mercury vapour lamp in conjunction with chlorine and bromine filters (A = 250-270m,u) being used as a light source [Svedberg, 1925;Svedberg & Eriksson, 1932]. The centrifugal field was approximately 200,000 times gravity in all experiments.…”

Section: M0-7mentioning

confidence: 99%

Observations on the crystallizable albumin fraction of horse serum

Kekwick

1938

Biochemical Journal

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The Molecular Weights of Phycocyan and of Phycoerythrin. Iii

Cited by 31 publications

References 0 publications

A New Phycoerythrin From Porphyra Naiadum

A New Phycoerythrin From Porphyra Naiadum

Phycobiliproteins and phycobilisomes: the early observations

Observations on the crystallizable albumin fraction of horse serum

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