Cryo electron microscopy and structure-based mutagenesis reveal that the bacteriophage BPP-1 contains two of the three major recognized viral folds, one of which exhibits a new topology.

An alternative iron storage system based on a 9.6 megadalton microbial protein compartment is able to sequester and store large amounts of iron.

The structure of phage L's Dec demonstrates a new fold within this family of proteins, and shows modulation of capsid binding occurs through two sites, with site 1 being preferred.