Catalyzes the 6 alpha hydroxylation oxidation of taurodeoxycholate to produce the pig specific bile acid taurohyocholic acid. O2 + reduced [NADPH--hemoprotein reductase] + taurochenodeoxycholate = H(+) + H2O + oxidized [NADPH--hemoprotein reductase] + taurohyocholate lithocholate + O2 + reduced [NADPH--hemoprotein reductase] = H(+) + H2O + hyodeoxycholate + oxidized [NADPH--hemoprotein reductase] Primarily expressed in liver. Low expression in kidney. Belongs to the cytochrome P450 family.