Detailed Description

Struct that represents a cell in the DP matrix.

See the Smith-Waterman recurrence function with the gotoh affine gap modification.

Each cell has three components: H, E and F. But note that the E and F components holds the same memory area, because the E and F components are a union. So, the cell structure may represent only two components simultaneously, the $(H,F)$ components or the $(H,E)$ components.