Figure 1. Alignment of deduced amino acid sequence of koala (A) CD4 and (B) CD8β with other marsupials.

Dashes indicate gaps introduced to optimise the alignment, and dots indicate identity with the koala. Koala qPCR targets are underlined. ^∗ indicates extracellular cystine residue in CD4 and CD8β, and open box in CD8β indicates potential N-linked and O-linked glycosylation sites. GenBank accession numbers from grey short-tailed opossum (Modo), tammar wallaby (Maeu) and Tasmanian devil (Saha) are listed in Table 1.