IEM 1460

转位子

　　转位子 transposon 系在原核生物的染色体或质粒中存在的转移因子之一，因运输标记基因而得此名。根据其由来或标记基因的种类而分为Tn1，Tn2，Tn3…，已发现许多具有以决定耐药性基因作为标记基因。其结构上的特征为，其两端具有插入排列顺序或其一部分，此插入排列有同方向的，也有逆方向的。例如，运输耐卡那霉素基因Tn5。其两端具有为1460碱基对（bp）反方向的插入排列顺序（图）。而运输耐氯霉素基因Tng，在两端则有同方向的插入排列顺序（ISI）。转位子转移后，在接近

Immunoelectron Microscopy of Antigen Processing in Dendritic Cells

achieved by high resolution immunoelectron microscopy (IEM). Other methods, which make use of different embedding materials, such as EPON, Spurr’s resin, LR white, or Lowicryls, also allow the detection of immunodeterminants. However, IEM is in many cases

Conventional and Immunoelectron Microscopy of Mitochondria

for this volume is the contribution immunoelectron microscopy (IEM) has made in the study of mitochondrial dynamics and in demonstrating the localizations of key mitochondrial proteins in yeast, including, though not limited to, Dnm1p, Fiz1p, and Mgm1p. This chapter is not intended