 A genome comparison between "L. rhamnosus" GG and "L. rhamnosus" GR-1 shows that GR-1 lacks "spaCBA"-encoded pili, an important adhesin in "L. rhamnosus" GG adhesion to the intestinal epithelial cells.In contrast, "L. rhamnosus" GR-1 utilises lectin-like proteins to attach to carbohydrates on the surface of the target cell.Lectin-like proteins preferentially bind to nonkeratinized stratified squamous cells which are found in the urethra and vagina.