Is this sentence correct? Is it possible to use present subjunctive?
You won't learn English unless it (should) be important for you.
I have come across this one as well.
The native protein is glycosylated and runs with an apparent molecular mass of kDa on SDS-PAGE, but the sugar mass is not believed to contribute to the target size unless it should be important for transport activity which seems unlikely as the N-glycosylation has no impact on the transport activity of GLAST.