Gabriele Burger

Gabriele Burger

Gabriele Burger was a Scientific Relations Manager at Leica Microsystems in Mannheim, Germany, until her retirement in 2020. Having a Diploma in Cell Biology, she has been an Application Specialist at Leica Microsystems for 19 years. Gabriele Burger was responsible for external and internal requests as well as the organization of trainings, workshops and congresses. She cooperated with key customers and was involved in international development processes. She has a wide knowledge of all the generations of Leica Microsystems’ Confocal Microscopes. 

Eukaryotic cells

使用钙指示剂 Fura2 的宽场钙成像

在真核细胞中,Ca2+是信号转导通路中最广泛使用的第二信使之一。细胞内的 Ca2+ 水平通常保持较低,因为 Ca2+ 常常与磷酸化和羧酸化化合物形成不溶性复合物。通常,细胞质中的 Ca2+ 浓度在 100 nM 的范围内。作为对刺激的反应,Ca2+ 可以从外部介质或内部储存释放,以提高 Ca2+ 浓度。

福斯特共振能量转移 (FRET)

荧光描述的是分子或原子在通过光的吸收激发电子系统后,自发发射光子的过程。发射的光子通常能量较低,因此波长较长(斯托克斯位移)。例如,蓝光激发可能导致绿色发射。如果第二个荧光分子能够吸收绿色光子,则该分子的发射再次发生斯托克斯位移,例如变为红色。这种再吸收在浓密样品中会导致测量误差(部分“内滤”效应)。在低浓度样品中,再吸收非常罕见。
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