CCDC85B and relapsing fever: This high amino acid identity is in agreement with immunoblot results, which showed that DipA-specific antiserum reacted with analogous protein domains of DipA and Oms38 in total protein fractions of both LD and RF Borrelia. In addition, similar biophysical characteristics (see below) of DipA and the Oms38 underlined this finding on the amino acid level and suggested that these proteins are homologues in agents of Lyme disease and in agents of relapsing fever.