B-Galactosidase of STK-1-1 is neutral,suitable pH=6.5, suitable temperature range 35-45 C,Within six ions, Cu2+,Fe2+,Ca2+ can inhibit the vitality of P -Galactosidase while K, Na+, Mg2+, can promote the vitality of P-Galactosidase.

• 在实验所研究的离子中，Cu~(2+)、Fe~(2+)、Ca~(2+)对酶的活力有抑制作用，K~+、Na~+、Mg~(2+)对酶有激活作用，其中Mg~(2+)可使酶的活力提高18.；4%25；