乙酰胆碱酯酶在拟黑多刺蚁脑部的分布

用组织化学方法研究乙酰胆碱脂酶(Acetylcholine esterase,AChE)在拟黑多刺蚁(Polyrhachisvicina Roger)脑部分布.结果显示,AChE在拟黑多刺蚁脑部分布广泛,主要分布于后脑、咽下神经节、中脑,其次是前脑的中央复合体、视叶、蕈形体冠,前脑的蕈形体柄和叶分布最少;品级间比较显示,工蚁视叶和嗅叶分布较雌蚁和雄蚁的少,雌蚁中央复合体的分布多于其他品级.由该结果推测AChE可能参与拟黑多刺蚁视觉和嗅觉信息传递;根据AChE组织化学在临床上着色判别标准确定蕈形体冠是蕈形体的感觉信息输入区,而草形体的柄和叶是蕈形体的运动信息输出区.     

The new yeast genetics

Gene cloning and yeast DNA transformation techniques have greatly enhanced the power of classical yeast genetics. It is now possible to isolate any classically defined gene, to alter the yeast genome at will by replacing normal chromosomal sequences with mutated derivatives produced in vitro, and to create DNA molecules that behave as autonomous replicons or minichromosomes. These unique features of the new yeast genetics have been used to study many problems in eukaryotic molecular biology.