Glutinous rice is distinguished from other types of rice by having no (or negligible amounts of)amylose, and high amounts of amylopectin (the two components of starch). Amylopectin is responsible for the sticky quality of glutinous rice. The difference has been traced to a single mutation that was selected for by farmers.[2][4]Like all types of rice, glutinous rice does not contain dietary gluten (i.e. does not containglutenin and gliadin), and should be safe forgluten-free diets.[citation needed]Glutinous rice can be used either milled or unmilled (that is, with the bran removed or not removed). Milled glutinous rice is white in color and fully opaque (unlike non-glutinous rice varieties, which are somewhat translucent when raw), whereas the bran can give unmilled glutinous rice a purple or black color.[5] Black and purple glutinous rice are distinct strains from white glutinous rice. In developing Asia, there is little regulation, and some governments have issued advisories about toxicdyes being added to colour adulterated rice. Both black and white glutinous rice can be cooked as discrete grains, or ground into flour and cooked as a paste or gel.