3. Old stuff
          3.2. Old physio stuff (around 2005)
              3.2.3. Physiology
                  3.2.3.12. Renal
                      3.2.3.12.11. Others
 3.2.3.12.11.2. Sulphate 

Urinary sulfates [WG21:p296]

Oxidation of cysteine is the ultimate source of most of sulfates in the urine.