Graduate Thesis Or Dissertation
 

Nucleotide sequence of two chloroplast genes from a Chlorella-like green alga : the large subunit of Ribulose-1,5-bisphosphate carboxylase/oxygenase and ribosomal protein S14

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  • Chlorella is a genus of unicellular, enkaryotic green algae. Chlorella-like algae are found as endocellular symbionts within a number of animal species. Two chloroplast genes were sequenced from the exsymbiotic strain Chlorella N la, originally isolated from Paramecium bursaria. The genes for the large subunit of ribulose-1,5-bisphosphate carboxylase/oxygenase (rbcL) and the ribosomal protein S14 (rps14) are oriented in the same direction and are separated by 402 bp. A comparison of the exsymbiont rbcL and a free-living Chlorella rbcL with other reported rbcL sequences was made. The gene of the exsymbiont was very closely related to the gene of the free-living species. There were 80 nucleotide differences between the exsymbiont and the free-living species, mostly in the third position of the codon. These substitutions translate into twelve predicted amino acid differences. From this information, it appears as though the chloroplast genome of Chlorella Nla has not diverged significantly from that of free-living Chlorella, at least on a functional level.
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