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phylogenetic tree

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phylogenetic tree

Diagram showing the evolutionary interrelations of a group of organisms that usually originated from a shared ancestral form. The ancestor is in the tree trunk; organisms that have arisen from it are placed at the ends of tree branches. The distance of one group from the other groups indicates the degree of relationship; that is, closely related groups are located on branches close to one another. Though phylogenetic trees are speculative, they provide a convenient method for studying phylogenetic relationships and evolution. See also phylogeny.


phylogenetic tree [‚fī·lō·jə¦ned·ik ′trē]
(evolution)


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Physicist Tanmoy Bhattacharya and HIV researcher Bette Korber have used samples taken by CHAVI across the globe - from both chronic and acute HIV patients - and created an evolutionary genetic family tree, known as a phylogenetic tree, to look for similarities in the acute versus chronic sequences that may identify areas where vaccines would be most effective.
However, due to high sequence dissimilarity, only 13 taxa could be utilized for a meaningful phylogenetic tree construction.
Material is structured around the specific algorithmic problems when dealing with structures commonly found in computational biology: biological sequences (such as DNA, RNA, and protein sequences); trees (such as phylogenetic trees and RNA structures); and graphs (such as phylogenetic networks and signaling pathways).
 
 
 
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