Ubiquitin (Hôa-gí: 泛素, 泛激素, tiāⁿ-tiāⁿ bô hoan-e̍k) sī 1 ê sió-hêng ê nn̄g-pe̍h-chit; tōa-pō͘-hūn ê chin-he̍k-sè-pau ū. Che chú-iàu ê llō͘-iōng tī teng-kì sè-pau lāi-té chi̍t-kóa-á m̄ ti̍h ê nn̄g-pe̍h-chit, pau-koat chhng-kòe sè-pau-mo̍h ê nn̄g-pe̍h-chit.