5 unsigned char ref_base:4, dummy:4; /** "XACMGRSVTWYHKDBN"[ref_base] gives the reference base */
6 unsigned char max_mapQ; /** maximum mapping quality */
7 unsigned char lk[10]; /** log likelihood ratio, capped at 255 */
8 unsigned min_lk:8, depth:24; /** minimum lk capped at 255, and the number of mapped reads */