The extracellular products of Anabaena cylindrica Lemm. I. Isolation of a macromolecular pigment-peptide complex and other components |
| |
Authors: | A.E. Walsby |
| |
Affiliation: | Marine Science Laboratories , Menai Bridge, Anglesey, Wales, LL59 5EH |
| |
Abstract: | The extracellular products of Anabaena cylindrica Lemm. comprise a large variety of compounds including peptides, brownish pigments and substances fluorescing white and blue in ultraviolet light. A number were separated or isolated using techniques of gel filtration, ion exchange and paper chromatography. Serine and threonine comprised over 90% of the amino acids in a group of complex pigmented and fluorescent compounds. One of these accounted for a large proportion of the peptide and pigment present. It contained a large pigment moiety of molecular weight > 5 000 which formed a firm complex with more than 10% of the iron supplied in the culture medium. The anti-polymyxin activity described by Whitton was not associated with any of the major pigments or peptides present. |
| |
Keywords: | electron transport FRRF light absorption PAM phytoplankton PSII quantum yield |
|
|