Distribution of lacrimal gland/tear and salivary gland/saliva Abp expressions by ancestral clade.

The five ancestral clades [8] are shown at the top as numbered, colored blocks. The complete map of Abp genes with arrows depicting genes (Abpa in blue, Abpbg in red) appears below the clade blocks with solid filled arrows showing complete (potentially expressed) genes and open arrows showing putative pseudogenes. <Abpa-Abpbg> and <Abpbg-Abpa> modules are numbered above the linkage map [8]. Gene expressions for transcripts in lacrimal and salivary glands and proteins in tears and saliva are scored as +/− and appear below the linkage map. Those positive as both PCR products from gland cDNA libraries that could be sequenced (i.e. transcripts) and proteins in the glandular secretion appear as red + signs; those found only as transcripts that could be sequenced appear as black + signs.