BLAST2.0 Parameters limitations

Valid combinations of gap opening and extension penalties

ex: for Blosum62, gap open=9 and gap exten=2 is allowed, but not gap open=10
With a non-valid combination, BLAST always returns " ***** No hits found ****** " !
gap extension -> 1 2 3
gap opening
3 Pam30
4 Pam30, Pam70
5 Pam30 Pam30, Pam70
6 Pam30, Pam70
Blosum80, Blosum90
Pam70
7 Pam30, Pam70
Blosum80, Blosum90, Blosum62
8 Pam30 Pam70, Blosum80, Blosum90, Blosum62
9 Pam30, Pam70
Blosum80, Blosum90
Blosum62
Blosum50
10 Pam30, Pam70
Blosum80, Blosum90, Blosum62
Pam250
Blosum45, Blosum50
11 Pam70, Blosum80, Blosum90, Blosum62
Pam250
Blosum45, Blosum50
12
Blosum62
Pam250
Blosum45, Blosum50
Pam250
Blosum45, Blosum50
13
Pam250
Blosum45, Blosum50
Pam250
Blosum45
14
Pam250
Blosum45, Blosum50
15
Blosum50
Pam250
Blosum45, Blosum50
16
Pam250
Blosum45, Blosum50
17
Pam250
Blosum45, Blosum50
18
Pam250
Blosum45, Blosum50
19
Pam250
Blosum45