The Institute is basically just a place where rich people could live out their most perveted kinks. And where governments and pharma- and tech-corporations can test all sorts of drugs and gear on human beings.
Of course the governments and the corporations cant be connected to the Institute, so its primarily funded by the fees the rich, depraved people are paying to "work" there.
It has labs, that are outfitted like their owner wants them to be. In the upper levels are clean and sterile high-tech labs, while the lower basement levels are more dungeon-like and resemble Frankensteins lab in a way.
If a scientist requests a new test subject, he has access to a large government database, where he picks a subject to his liking. Specialists then see to it, that the subject will be brought in and delivered to his lab. The use of drugs and/or force is necessary in most cases.
Experiment range from scientific projects to find new drugs for all sorts of purposes, to simple personal and perverted experiments like interspecies cross-breeding, bodymodification, torture and others.
Id be glad to work out more specifics with you, if youd like.