Yeah, I can see quite a few: dose/dosing, formulations, potency (needs to be more effective than Kuvan and needs to maintain it over time), rate of allergic reactions. I've looked for new data from PEG-PAL's phase II trial but couldn't find in their web. Perhaps they've updated at some recent conference?
GALNS is still the key
And I feel more confidant with GALNS given the 2 years data from phase 1/2 extension trial:
Register for free to join our community of investors and share your ideas. You will also get access to streaming quotes, interactive charts, trades, portfolio, live options flow and more tools.