Ok, so Peter knows that he absorbs powers from those he meets. So lets work through this logically here.

1. Peter meets Adam.
2. Adam says "My blood has healing properties," and uses it to completely heal Nathan, who was horrifically burnt.
3. Mohinder uses Claire's blood to revive Noah's Corpse, and later Maya. So we, the audience, know the blood of a Regen can heal anything, even death by headshot.
4. Nathan gets shot in the chest 2wice standing right next to Peter.
5. Peter panics and appears to not know what to do other than hold his dying brother.

So. In the opening scenes of Volume 3, Peter better damn well realize that his bro getting shot isn't even a problem, just an annoyance, as he can heal him from anything with his own blood. If he doesn't just heal him, or later revive him from death, this show has officially proven that its most powerful hero is completely r e t a r d e d. Add that to the fact that Peter is the one who directly almost wipes out either NYC (Vol. I) or the entire world by unstoppable virus (Vol. II). How about in Volume III, Peter just does nothing and lets Hiro or someone with a brain that works do all the world saving, oh wait, that's what he already did...

Well Peter copied powers of a regen, he himself isnt a regen - we aren't sure if those powers are always on or he activates them with his mind somehow.

If his all his copied powers are always on and available - then his blood would work. I thought sometime in the first season they said that he had to actively think about using a power, like when Claude launched him off a roof.

Of course that theory goes sour when he regnerated after Claire removes the glass from his head, hard to be thinking when you are dead.

Not to mention that Peter can time travel. Why not think about reversing time and then pushing Nathan out of the way... or giving him a bullet poof vest in the past.

I know they'll probably say that Peter doesn't know how to use his time abilities, but it would be nice if he at least tries...

He tried to travel to future to save Caitlin, I'm hoping he shows the same respect to his brother, if his blood doesn't work.

Yes, his regeneration is automatic just like Adam and Claire. After he got beaten up by the Irish gang, he was bleeding. He didn't even remember Claire and his wound just automatically heals itself. So Peter's power does turn himself into a precise copy of the character whose power he imitated. And the 2nd evidence was provided by yourself:





I agree. If there is a time for Peter to start taking his power seriously, this will be it.

At first it seemed he had to think about powers to use them - now it seems the more he has them, the more automatic they have become.

But we still would have to see if his blood (outside of his body) works the same as Claire's and Adam's. I would hope that's the first thing Peter would try. We would assume it would - but that just makes things too easy.

Peter's power of asorbtion of powers and the ability to mimic the powers he absorbs is like all other heroes brought on by his brain. If Peter's blood were taken from him the cells in the blood would no longer be triggered to regenerate because the connection to the brain has been severed. This is why Peter, Claire and Adam can not heal when thier brains have been hurt by objects. Once the object is removed the healing begins again.
So as I said the blood being removed from peter would no longer have the power of regeneration once removed.
Also once all the air leaves the grave that Adam is in...he will die of suffication. Once someone digs him up as soon as oxygen is absorbed he will wake up, just like when Claire and Peter woke up after they died; when the object stopping thier healing(in Adam's case a lack of oxygen, in peter's case the glass in his head & Claire the stick in her spinal cord) is removed they live again. This is why a total removal of the brain or a complete and total head shot or head removal would kill someone with cell regeneration ability. No brain..no power.
Nathan would not keep the healing abilities that were brought on by Adam's blood. Once the blood recycles through his system the abilities with it will dissapear. I believe after a blood transfer like this that maybe you would be able to keep the healing power for a few hours at most.

This is what I agree with. He himself is not a regen, he is only copying the abilities of a regen. And the abilities he copies are not always on. (His mind reading isn't always on, while Matt's is always on) So Peter's body can't produce healing blood because his body doesn't work like Adam's and Claire's.

Now, I'm not sure if Peter is aware of this or not, but the reason why he didn't do anything when his brother got shot, was because HIS BROTHER JUST GOT SHOT. He was probably scared as hell! Duh!

One thing people don't seem to get it...

We know Claire's blood can heal, but PETER DOESN'T KNOW!

Adam's blood can heal, but how can Peter knows his blood can heal? He can absorb his power doesn't mean he has the same blood as Adam.

Are you sure yourself that Peter's blood can heal? If we are not sure, how can Peter know? Sheesh.

Why are people so hard on Peter. Give that poor dude a break already!

It's very likely that Peter could bring his brother back.

But if he doesn't, then you know it was just to keep the drama on the show.

Pete (and Sylar), once he assimulates another special's power, owns that power--completely! So, Peter has the very same power that Adam and Claire have and therefore, is a "regen".

He will hopefully realize this and also realize (like Dorothy in "The Wizard of Oz") that he always had the power (...to heal his brother) and that he was duped by the super duper, Adam.

So, whether you call him a mimic, a sponge or just plain dumb...he too has the power to heal (with his blood).

Creator

Whether Peter knows his blood can heal other's or not, he does know he has abilities of those he has been around, he knows Adam's blood can heal, he has been around Adam. So why isn't he thinking "gee, maybe being around Adam means I can save my brother with my blood now" and get him to one of the med rooms in primatech or teleport him to a hospital or whatever or even stop time, until you can find a syringe, draw out some of your own blood and inject it into your brother. What is the worse that can happen. He stays dead? I realize he is probably in shock, but he is a nurse, and when someone codes, you don't stand there with your jaw hanging, some part of his nurses training should have kicked in to deal with those sucking chest wounds.

Actually in a logical way, only the main host of the regen power would be able to provide the blood needed to ressurect someone. In that case, peters shouldn't and wouldn't do because he just mimics that power when needed. It's not constantly active in his body like in Adams and Claires cases.

However, with so many twists and turns in the show and so many unlogical things, it wouldn't surprise me if they do as if his blood turned to the same blood adam and claire are caring so...

It's been so long I actually forgot that Peter is indeed a nurse!

But whether his blood can heal Nathan or not - I'd be surprized if he doesn't at least try.