器 TIANDIN UNDVIERSTATV Techniques for similar DNA MSA 2. Center star strategy S3 S2 S4 tree alignment Center star strategy ⑨ TIANJIN UNIVERSITYTechniques for similar DNA MSA 2. Center star strategy S1 S2 S3 S4 S5 S1 S2 S3 S4 S5 tree alignment Center star strategy