I'm having a bit of trouble with this section of a biology paper:
"LSU was amplified in these species using F63.2 and Mollusc28R2, which amplified all but ~400 bases at the 3' end of the gene."
Does it mean it amplified almost all 400 bases, or every base except for those 400.
Thank you in advance. I don't study Biology though, I'm just translating this article for a friend.