The biodegradation ability of sterane is C27>C28>C29.Before the great biodegradation of the sterane,those maturity indicators such as isomerization of C29 steranes at C20 vary slightly.

• 研究结果显示,规则甾烷先于重排甾烷发生生物降解,甾烷降解由易到难的顺序为C27>C28>C29。