realizată de aina atikah 11 ani în urmă
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low mutability
Tyr, Phe, Leu, Cys, Trp
high mutability
Asn, Ser, Asp, Glu
deletion
insertion
substitution
more than 95% similarity
design to rapidly align longer nucleotide sequence
500 times faster than BLAST
BLAST-like alignment tool
Smith-Waterman local alignment
four component for BLAST search
CHOOSE optional parameters
output format
word size
expect value
E = Kmn e-λS
Extreme Value Distribution (EVD)
substitution matrix
turn filtering on/off
organism
different for every blast program
CHOOSE database
pnv_nr
Subtopic
pat
Pdb
RefSeq
Swissprot
Month
nr
SELECT BLAST program
tblastx
tblastn
blastx
blastn
blastp
CHOOSE sequences
Blocks Substitution Matrix (Henikoff)
local alignment (distantly related protein)
X% identical
Percent Accepted Mutations (Dayhoff)
global alignment (closely related protein)
X% divergence
PAM1
probability of occurance + percent accepted mutations = mutation probability matrix
one PAM (unit of evolution) = 1% amino acids changed between two proteins
at least 85% identical
bit scores (normalized scores)
raw scores (calculate from substitution matrix)
extension - elongate gap
opening - inroduce gap