BIO373H5 Lecture Notes - Lecture 23: Ribosomal Rna, Pelagibacterales, Protein Structure
Document Summary
Oceanic; water and marine snow marine snow, particulate organic material. Thymine if thymine, a precursor of dna, could be radioactively labelled, this could be used to measure the multiplication of dna and hence growth of that organism. Came up with thymidine which is tritiated thymidine: worked for some cells/organisms and did not work for others. Couldn"t cultivate in the lab for the longest time because it kept dying from production of its own toxins. Sar11 is now known to be the dominant bacteria in the oceans. This group accounts for 26% of all ribosomal rna genes that have been identified in sea water. Identified in nearly every pelagic marine bacterioplankton community. Genome sequence info that would low rrna gene trees to be related to broader patterns in microbial genome evolution is scant. High abundance at temperate regions greater richness supported by more diverse systems.
