Abstract：
Organelles are membrane bound structures that compartmentalize biochemical and molecular functions. With improved molecular, biochemical and microscopy tools the diversity and function of protistan organelles has increased in recent years, providing a complex panoply of structure/function relationships. This is particularly noticeable with the description of hydrogenosomes, and the diverse array of structures that followed, having hybrid hydrogenosome/mitochondria attributes. These diverse organelles have lost the major, at one time, definitive components of the mitochondrion (tricarboxylic cycle enzymes and cytochromes), however they all contain the machinery for the assembly of Fe-S clusters, which is the single unifying feature they share. The plasticity of organelles, like the mitochondrion, is therefore evident from its ability to lose its identity as an aerobic energy generating powerhouse while retaining key ancestral functions common to both aerobes and anaerobes. It is interesting to note that the apicoplast, a non-photosynthetic plastid that is present in all apicomplexan protozoa, apart from Cryptosporidium and possibly the gregarines, is also the site of Fe-S cluster assembly proteins. It turns out that in Cryptosporidium proteins involved in Fe-S cluster biosynthesis are localized in the mitochondrial remnant organelle termed the mitosome. Hence, different organisms have solved the same problem of packaging a life-requiring set of reactions in different ways, using different ancestral organelles, discarding what is not needed and keeping what is essential. Don\'t judge an organelle by its cover, more by the things it does, and always be prepared for surprises.
摘要：
细胞器是分隔生化和分子功能的膜结合结构。随着分子的改进，生化和显微镜工具protistan细胞器的多样性和功能近年来有所增加，提供复杂的结构/功能关系。这在氢的描述中尤其明显，以及随之而来的各种结构，具有杂合氢体/线粒体属性。这些不同的细胞器已经失去了专业，有一次,线粒体的确定成分（三羧酸循环酶和细胞色素），然而，它们都包含了组装Fe-S团簇的机器，这是他们共享的单一统一特征。细胞器的可塑性，像线粒体一样，因此，从其失去作为有氧能量产生发电厂的身份的能力中可以明显看出，同时保留了需氧菌和厌氧菌共同的关键祖先功能。有趣的是注意到Apicoplast,一种非光合质体，存在于所有根尖丛原生动物中，除了隐孢子虫和可能的gregarines，也是Fe-S簇组装蛋白的位点。事实证明，在隐孢子虫中，参与Fe-S簇生物合成的蛋白质位于线粒体残余细胞器中，称为有丝分裂体。因此，不同的生物体以不同的方式解决了包装一系列需要生命的反应的相同问题，使用不同的祖先细胞器，丢弃不需要的东西，保留必要的东西。不要以细胞器的封面来判断它，更多的是它所做的事情，永远为惊喜做好准备。
