BIOL240 Lecture Notes - Lecture 3: Rumen, Dna Supercoil, Long Term Ecological Research Network
4 Nov 2017
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Document Summary
Genetic analyses show them to be di erent. Many live in some of the most inhospitable places (for humans) on earth. No known archaeal human pathogens -> none are dangerous. Comparisons of rrna gene sequences can establish phylogenetic trees . Woese and fox began these studies in 1970s. Archaea and eukarya may have branched o from bacteria. Development of histones may have been an easy branch point event . Size is usually 0. 5 to 5 um in diameter. Can very greatly (n. equitans=0. 4um in diameter, thermoproteus spp. can be. Inclusion bodies (gas vacuoles) have been observed in some species. Singular circular chromosomes and lab a membrane-bound nucleus. Many of dna replication enzymes of archaea look like those of eukarya. Development of histones may have been an early branch point event in evolution of. Histones form structures that dna wraps around (di erent in archaea from eukarya) Cytoskeleton homologues found in both other domains.
