 "Lactobacillus rhamnosus" GG (ATCC 53103) is a strain of "L. rhamnosus" that was isolated in 1983 from the intestinal tract of a healthy human being; filed for a patent on 17 April 1985, by Sherwood Gorbach and Barry Goldin, the 'GG' derives from the first letters of their surnames.The patent refers to a strain of ""L. acidophilus" GG" with American Type Culture Collection (ATCC) accession number 53103; later reclassified as a strain of "L. rhamnosus".The patent claims the "L. rhamnosus" GG (ATCC 53103) strain is acid- and bile-stable, has a great avidity for human intestinal mucosal cells, and produces lactic acid.