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Recently, the cDNA encoding PTA1 has been cloned from activated Jurkat cells by Sherrington and show it to be a novel member of the immunoglobulin superfamity with the unusual structure of two V domains only. This result provided a fundamental base for further study on PTA1 functions and its ligand identification.

从核苷酸推导的氨基酸序列表明PTA1由334个氨基酸组成，先导序列18个氨基酸，成熟PTA1分子为316氨基酸，胞膜外区232个氨基酸有两个Ig样结构域，属于免疫球蛋白超家族成员，胞浆区59个氨基酸中，含有3个酪氨酸，6个丝氨酸和6个苏氨酸，有PKC和PTK作用的基序，这些特征都与PTA1分子的功能密切相关，因此PTA1 cDNA克隆成功为进一步深入研究PTA1分子的作用机理奠定了坚实的基础。

The Transcendence of Lingguistics——A Study on M.M. Bakhtin's Language Philosophy Abstract M. M. Bakhtin is a thinker in Soviet Era enjoying high reputation throughout the world. He made lots of influential achievements in various subjects and domains of human science.

超越语言学——巴赫金语言哲学研究米·米·巴赫金（〓，1895-1975）是俄罗斯苏联时期享有世界性声誉的思想家，在人文科学的多种学科领域卓有建树，深具影响力。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。