I've done it on a sequencer and a bass. The notes are the same, but you need to check the proper tuning.
It's a synth bass, but you can play it with some effects on a regular bass and make it sound good. Every Mofo bass tab I've seen is off, of course I don't read most U2 bass tabs because I play guitar mostly.
In concert it's tuned down half step, album may be as well but I am not positive, so again, check that, the live bass would then be G#, and so on..........
all on the A string
hit the E (7), strum open, hit the C (3), strum open, then hit the D (5), strum open, then do the ascending part C thru E (3-7) and start over again........
of course for proper timing, you need to listen and play along
a tab would look something like:
G------------------------------------------------
D------------------------------------------------
A-7(h)0003(h)0005(h)000334455667---
E------------------------------------------------
Hit (h) the notes and strum the A open.
I used 3 (zeros) 0's for the hell of it on the open A, you'll have to strum at your own pace and play it by ear. I actually hit it about 4 times real fast, so whatever.......
The ascending bit is timing as well, I wouldn't swear to you how many times I play each note, but after listening to the record, or even a boot it's easy to pick up on. All timing.
That crude tab I typed out isn't perfectly transcribed, of course.
If it still doesn't sound right to you, I may need to explain it further, because I play it about as accurate as I could imagine, on a bass and not a synth.
Anyhow all you need is the notes and where they go, this bassline is 95% timing.