Could FP-shell kill Ergo Proxy?


This question contains spoilers for the whole anime.

> Ergo Proxy, being imperfect creation of Proxy One, is shown to be immune to
> sunrays (all other proxies die when in direct sunlight). It seems to me,
> that FP-shell, which works by emiting UV rays on contact (thus simulating
> sunlight and killing the proxy), shouldn't be able to hurt Ergo. However,
> when hit by FP-shell from Raul, it looks like it's working.

Is this explained somewhere?

