VTN and inflammatory bowel disease: Other species, including the species Yamadazyma Mexicana from the Saccharomycetales order was mapped to Chr 11 (Add; 3.9 Mb; LOD = 6.98) containing the candidate genes Nos2 and Vtn. Polymorphisms in Nos2 gene encoding for the inducible nitric oxide synthase 2 (NOS2) were previously reported in IBD patients80.