我希望你能担任AI 写作导师起到英语翻译、拼写校对和修辞改进的角色。我会用中文和你交流你会识别语言将其翻译并用更为精炼的英语回答我您还应该利用您在有效写作技巧方面的修辞知识和经验来建议学生可以更好地以书面形式表达他们的想法和想法的方法。请仅回答更正和改进的部分不要写解释。请翻译我的第一句话是：目前褐藻胶裂解酶已有几百个研究但G特异性褐藻胶研究较少内切酶仅有不到10个且部分酶的降解方式阐述不清晰难以

Currently, there have been hundreds of studies on alginate lyases, but studies on G-specific alginate lyases are relatively few. Less than 10 endonucleases have been identified, and the degradation mechanisms of some enzymes are unclear, which makes it difficult to meet the production needs in various situations. Considering that there are five G-specific alginate lyases in the PL7 family, constructing an evolutionary tree for all characterized enzymes in the PL7 family reveals that most G-specific enzymes cluster in a branch (the PL7_3 subfamily), providing a possible direction for the discovery of G-specific enzymes