Merge branch 'master' of https://github.com/junjunlab/BioSeqUtils

Author: junjunlab

README.md

@@ -31,6 +31,7 @@ library(BioSeqUtils)
 > - [**基因特征序列提取 R 包 BioSeqUtils**](https://mp.weixin.qq.com/s?__biz=MzkyMTI1MTYxNA==&mid=2247508252&idx=1&sn=d7461dc312dba82b1a795331955e9fac&chksm=c1849b6df6f3127b4a4e9bcad885fff6eb4b69dc62ca29dc90d0935a39f2c160c6c78ea761e9&token=1422368458&lang=zh_CN#rd)
 > - [**About BioSeqUtils**](https://mp.weixin.qq.com/s?__biz=MzkyMTI1MTYxNA==&mid=2247508288&idx=1&sn=749071718786c08fc380247fa69d25ce&chksm=c1849b31f6f312271573bf922caf4e7cbce0add38f4da9e45540197da45ab35a3bdcbf93c2e2&token=1422368458&lang=zh_CN#rd)
 > - [**BioSeqUtils 还能再快一点?**](https://mp.weixin.qq.com/s?__biz=MzkyMTI1MTYxNA==&mid=2247508657&idx=1&sn=124559873b5c3c99d7c80bdb7498200f&chksm=c18498c0f6f311d6a46b31ce0395a0d0cb4a6ff46102260ac1512f905d25b1c26c8b556f079e&token=1698519075&lang=zh_CN#rd)
+> - [**BioSeqUtils 延伸序列及提取启动子序列**](https://mp.weixin.qq.com/s?__biz=MzkyMTI1MTYxNA==&mid=2247508341&idx=1&sn=7c9cfc79d1c89b8da15b711893a49616&chksm=c1849b04f6f31212a542bd87552aaabd5e88376305990c8c9861facd2e004fb0fae8ee4ae47c&scene=178&cur_album_id=1928647345156521990#rd)
 > - [**工作中自己有用的小函数**](https://mp.weixin.qq.com/s?__biz=MzkyMTI1MTYxNA==&mid=2247508705&idx=1&sn=71cc7fa3fc7950b3b8f80f486465f720&chksm=c1849890f6f31186176b9102de0e88adb8314f1d9e875a0d417cad7cbeba0a5e8cf9ac05941c&token=1698519075&lang=zh_CN#rd)
 > - [**手把手教你绘制染色体结构图**](https://mp.weixin.qq.com/s?__biz=MzkyMTI1MTYxNA==&mid=2247508733&idx=1&sn=4dc7927ac4b1c065f230a6bf934ed8f3&chksm=c184988cf6f3119aaaabcca868ddbe6dd33bf3040917b9aac6919020590ecd032130371319f5&token=1698519075&lang=zh_CN#rd)
 > - [**染色体绘制之温故而知新**](https://mp.weixin.qq.com/s?__biz=MzkyMTI1MTYxNA==&mid=2247508772&idx=1&sn=5efd2503f980803259c209d59d0f4abc&chksm=c1849955f6f310438c821c416fef48260e1660c7a732158f73d9c8236b1e856ea5acf2691ef7&token=536314270&lang=zh_CN#rd)