已经分化的组织分泌物称为抑素.Substances differentiated tissues secrete are called chalone.目的:在酿酒酵母中表达和分泌人血管抑素.To express and secrete human angiostatin in S . cerevisiae.目的 观察生长抑素十四肽 ( 施他宁 ) 对食管静脉曲张破裂出血的治疗效果.Aims : To evaluate the effe...
By 1973, this gap had narrowed almost to vanishing point.到1973年，这一差距已缩小到几乎为零。Many of the ranchers themselves see all this tourism as a cheeky attempt to commercialise a real and vanishing culture.在很多农场主看来，这种旅游完全是一种厚颜无耻的行...