[Biopython] NcbiblastnCommandline vs subprocess blast

[Tanya Golubchik]

Hi Peter,

Thank you for your help. You're right that it's the word size, although 
not in the way this was suggesting -- what happened was that with my 
selected word size, some queries were failing with -culling_limit 1 (I 
still don't quite know why this happens, it seems to be a blast bug) and 
defaulting to culling limit 2 -- which is fine, but at this point they 
were losing the word size argument (my stuff-up).

Thanks again!

Tanya