There are several major differences between biological sequential patterns and transactional sequential patterns. First, in transactional sequential patterns, the gaps between two events are usually nonessential. For example, the pattern $$purchasing a digital camera two months after purchasing a PC$$ does not imply that the two purchases are consecutive. However, for biological sequences, gaps play an important role in patterns. Second, patterns in a transactional sequence are usually precise. However, a biological pattern can be quite imprecise, allowing insertions, deletions, and mutations. Discuss how the mining methodologies in these two domains are influenced by such differences.