Yumanity Therapeutics Inc. said that Merck & Co. Inc. is making a big bet on its nascent neurodegenerative disease pipeline, licensing exclusive rights to programs addressing amyotrophic lateral sclerosis (ALS) and a rare type of dementia in a deal with up to $500 million in potential milestone payments. The collaboration also includes an up-front payment, money toward a series C financing and potential royalties on net sales of the licensed programs, though the value of those elements wasn't disclosed.