This family includes the Deinococcus DdrB protein which is a ssDNA binding protein. This family also includes some possibly distantly related cyanobacterial proteins. However, these are not strongly supported. The structure of DdrB is known.

1: DdrB protein, an alternative Deinococcus radiodurans SSB induced by ionizing radiation. Norais CA, Chitteni-Pattu S, Wood EA, Inman RB, Cox MM; J Biol Chem. 2009;284:21402-21411. PMID:19515845

2: Analysis of Deinococcus radiodurans's transcriptional response to ionizing radiation and desiccation reveals novel proteins that contribute to extreme radioresistance. Tanaka M, Earl AM, Howell HA, Park MJ, Eisen JA, Peterson SN, Battista JR; Genetics. 2004;168:21-33. PMID:15454524