Figure 2.

A. Domain architectures of OST-HTH proteins. The domains are shown approximately scale but the intervening non-globular regions are not shown. The phyletic pattern typical of each architecture is shown below the illustrated representative. The species abbreviations and protein labels are as in figure 1. We observed that the DUF2384 domain fused to certain bacterial LK-nucleases is another HTH domain distinct from the OST-HTH described in this article. A key is provided for the domains whose names have been abbreviated in a non-standard fashion. B. Architectural network for the OSK-HTH domain. The network is centered on the OST-HTH with the other domains grouped as per their function. The arrows indicating the directionality of the connections have been omitted for easier examination.