Table of Contents
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Phylogenetic inference from
Proteins
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Why protein phylogenies?
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Proteins were the first molecular
sequences to be used for phylogenetics
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Phylogenies from proteins
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Evolutionary models for amino
acid changes
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Phylogenetic trees from protein
alignments
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Character states in DNA and
protein alignments
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DNA->Protein: the code
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DNA->Protein
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Codon degeneracy: protein alignments
as a guide for DNA alignments
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Evolutionary models for amino
acid changes
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Evolutionary models for amino
acid changes
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Amino acid physico-chemical
properties
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Amino acid physico-chemical
properties
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Amino acids categories 1: Doolittle
(1985). Sci. Am. 253, 74-85.
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Amino acids categories 2
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Phylogenetic trees from protein
alignments
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Trees from protein alignment:
Parsimony methods - cost matrices
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Parsimony: unweighted matrix
for amino acid changes
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Parsimony: weighted matrix for
amino acid changes 1: minimal changes of amino acids
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Weighting matrix based on minimal
amino acid changes - PROTPARS
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Phylogenetic trees from protein
alignments
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Protein similarity measurements:
scoring matrices
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Amino acid substitution matrices
(MDMs)
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Protein similarity measurements
with scoring matrices
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How is an MDM inferred?
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MDM - An example
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How is an MDM inferred?
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Log-odds matrices
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The PAM and JTT matrices
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The BLOSUM matrices
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BLOSUM62 Amino Acid Substitution
Matrix
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Pairwise distance estimation
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Pairwise distance estimates
for divergent Sequences
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Ideally each pairwise comparison
would have its own specific model
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Phylogenetic trees from protein
alignments
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Protein phylogenies: some software
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PHYLIP
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PUZZLE4.0
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PUZZLE4.0
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PUZZLE4.0
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PUZZLE4.0
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PUZZLE4.0
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PROTML2.2
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PROTML2.2
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PROTML2.2
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PROTML2.2
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Summary
|
Author:
Robert Hirt
Email: rch@nhm.ac.uk
Home Page: http://www.nhm.ac.uk/zoology/home/hirt.htm |