Wild-type cyanobacteria

Modern life comes in very many forms animals, plants, and single-celled eukaryotes in the Eucarya domain prokaryotes in two great domains, Archea and Bacteria (Woese, 1987 Woese et al, 1990), and not-life viruses. Some not-life is even anthropogenic the wild-type polio virus that used to be found in water bodies is now replaced in the pools and rivers of America and Europe by the altered vaccine-type virus. From all this information, deductions can be made. Clearly, multicelled life came from single-celled life less obviously but most probably each of our cells carries mitochondria that are descended from symbiotic purple bacteria. Plants, in addition, carry chloroplasts that are descended from partner cyanobacteria. 

Cyanobacteria possess a C02-concentrating mechanism which involves active transport of inorganic carbon (C ). The molecular mechanism of the C -transporting system is not yet understood but it might be studied with the aid of mutants defective in C- transport. Several mutants of Synechococcus PCC7942 which require high CO2 for growth have been reported Cl-3]. All of these mutants, however, showed the activity of Cj transport comparative to that in the wild type (WT) cells. To date, mutants of cyanobacteria defective in C transport have not been obtained. 

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