Primary and secondary structure.

原生构造和次生构造。

The secondary structure of root has large vessel diameter.

根的次生木质部导管大。

L528M mutation has no effect on secondary structure of protein.

L 528 M变异不影响蛋白质二级结构。

The primary structure and early secondary structure were normal.

根的初生结构和早期的次生结构都是正常的。

Describe the difference of secondary structure between root and stem.

简述根与茎次生结构的区别？