Immunogen sequence: LPEFLTHQYK YEAGEIRWGA EGRDVCAANG SGGDEGPDPD LICRNRTATN M. SLCO3A1 mediates the Na+-independent transport of organic anions such as estrone-3-sulfate. It mediates transport of prostaglandins (PG) E1 and E2, thyroxine (T4), deltorphin I