Phycobilisomes from the nonchromatic adapting cyanobacterium Spirulina platensis are composed of a central core containing allophycocyanin and rods with phycocyanin and linker polypeptides in a regular array. Room temperature absorption spectra of phycobilisomes from this organism indicated the presence of phycocyanin and allophycocyanin. However, low temperature absorption spectra showed the a...

A method for stably purifying a functional dye, phycocyanin from Spirulina platensis was developed by freezing and thawing method. Among various buffers used for phycocyanin yield efficiency sodium phosphate buffer (pH 7 and 0.1 M) was found to be most suitable for highest yield. During comparison of various buffers, sodium phosphate buffer was found as best buffer with 146 ±0.265 mg/g phycobil...

Synechococcus, C-Phycocyanin, Sulfur Nutrition The cyanobacterium Synechococcus 6301 is able to use a lim ited number o f sulfur compounds as the only source o f sulfur supply such as sulfate, thiosulfate, thioacetic acid, mercaptoacetic acid, thioacetamide, L-cysteine and glutathione. Compounds containg thioether linkages such as methionin or S-methylcysteine and all compounds investigated so ...

Response surface methodology (RSM) based on the 23 factorial central composite design (CCD) was employed to evaluate optimum culture conditions (temperature, light irradiance and agitation) to enhance biomass and phycocyanin content of Spirulina platensis. The predicted maximum biomass and phycocyanin content by RSM was 1.06 g L-1 and 107 mg L-1, respectively, whereas maximum biomass and phycoc...

Oxalate induced renal calculi formation and the associated renal injury is thought to be caused by free radical mediated mechanisms. An in vivo model was used to investigate the effect of phycocyanin (from Spirulina platensis), a known antioxidant, against calcium oxalate urolithiasis. Male Wistar rats were divided into four groups. Hyperoxaluria was induced in two of these groups by intraperit...

Phycocyanin and phycoerythrin are phycobiliproteins that function as photosynthetic antennae pigments in various types of algae (O'Carra & O'hEocha, 1977). Phytochrome, a related phycobiliprotein, plays an important role in photomorphogenesis in higher plants (Pratt, 1978). The chromophores of these proteins are bilins, which are closely related in structure to each other and to the mammalian b...

Phycocyanini is ani accessory pigmenit found in the photosynthetic apparatus of blue greeni, cryptomonad, and red algae (1). The phycocyanin miolecule consists of a protein to which are bound approximately 20 to 30 residues of the straight-chained tetrapyrrolic (bile pigment) chromophore. phycocyanobilin (10). Coniventionial miiethods used to determiine the chromophore compositioun of proteins ...

This study was performed to determine the potential hepatoprotective and anti-inflammatory effects of the microalgae pigment phycocyanin in galactosamine-induced acute liver damage in rats. Phycocyanin (50-200 mg kg i.p) was administered one hour before the galactosamine (600 mg kg i.p) and the blood was extracted 24 hours later to determine alanine amino transferase (ALT), aspartate amino tran...

Cell disruption is an important step during the extraction of C-phycocyanin from Spirulina platensis. An ultrafine shearing method is introduced and combined with soaking and ultrasonication to disrupt the cell walls of S. platensis efficiently and economically. Five kinds of cell disruption method, including soaking, ultrasonication, freezing-thawing, soaking-ultrafine shearing and soaking-ult...

1. In Chroococcus a quantum of light absorbed by phycocyanin has 90 per cent the chance of doing photosynthesis that a quantum absorbed by chlorophyll has. 2. By a process analogous to internal conversion in radioactivity (but with the linear dimensions and the wave length 10(4) times larger) there will be transferred from phycocyanin to chlorophyll See PDF for Equation (a number of the order o...