[Jalview-discuss] pca

[Hadas Ner Gaon]

Dear members
Can you please help me understand why the blusom score in the PCA analysis is not reciprocal.
Those are the results of the output values of 4 proteins sequences PCA.
           Seq1      seq2    seq3    seq4
seq1 1292.00 930.00 643.00 631.00
seq2 931.00 1289.00 589.00 633.00
seq3 622.00 567.00 1338.00 768.00
seq4 629.00 630.00 785.00 1303.00
Why the score of seq1-seq3 is 643 while the seq3-seq1 score is 622?
Regards,
Hadas Ner-Gaon
 

Hadas Ner-Gaon , Ph.D. 
The Rubin lab
The Shraga Segal Dept. of Microbiology and Immunology & NIBN
Ben Gurion University 

Building 39, room -113
POB 653, Beer Sheva 84105, Israel
Phone: 08-6477180
email: nergaon at bgu.ac.il‎
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