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TTMTHFR polymorphism and vitamin state in 51 PBC patients n (%)
| MMTHFR | Low folate, normal HCY | Normal folate, high HCY | Low folate, high HCY | Normal folate, normal HCY | Total No patients |
| CT | 8 (38) | 0 | 10 (47.6) | 3 (14.45) | 21 |
| CC | 8 (57) | 0 | 2 (14.5) | 4 (28.5) | 14 |
| TT | 3 (18.7) | 2 (12.5) | 9 (56) | 2 (12.5) | 16 |
| Total | 19 | 2 | 21 | 9 |
