 The study examined the structure of the IFTA complex from protozoan tetrahymenothermophila, which is involved in the transport of proteins and other materials within cells. The researchers found that the IFTA complex has two distinct states, one elongated and one folded. They also discovered that the IFTA complex undergoes changes to its shape when it is incorporated into the anterior grade IFT train. This provides new insight into how the IFTA complex assembles into the anterior grade train, as well as how the IFTA complex interacts with other components of the train. This article was authored by Yuan Yuanma, Zhen He, Shao Bai Li, and others.