History of diabetes further clarified in 1921, when Sir Frederick Grant Banting and Charles Herbert Best repeated the work of Von Mering and Minkowski, and went further to demonstrate they could reverse induced diabetes in dogs by giving them an extract from the pancreatic islets of Langerhans of healthy dogs. The islets of Langerhans was discovered in 1869 by an anatomist named Paul Langerhans. He identified the keys cells in the pancreas which produce the main substance that controls glucose levels in the body. Banting, Best, and colleagues (especially the chemist Collip) went on to purify the hormone insulin from bovine pancreases at
Where You Lead for "Where You Lead", reflecting the fact that soon after the release of "Tapestry" King came to the realization that "Where You Lead" was somewhat politically incorrect and as a result stopped performing it live, only reinstating the song in her concert setlists following its 2000 lyrical revision (see Section 3 below). Additional musicians Barbra Streisand recorded "Where You Lead" in a 21 April 1971 session which would yield seven tracks featured on the August 1971 album release "Barbra Joan Streisand", which album would include a total of three covers of "Tapestry" tracks: "Where You Lead", "Beautiful", and "You've Got