we analyzed the amino acid compositions
of proteins from archaeal halophilic bacteria and
non-halophilic bacteria, including thermophilic
eubacteria, thermophilic archaeon, and mesophilic
bacteria, in terms of the protein surface and
interior. The organisms were divided into three
groups according to the environments in which
they live, namely halophilic (denoted as GHA),
non-halophilic and mesophilic (GNO), and thermophilic
(GTH) groups. The three halophiles other
than Halobacterium sp. NRC-1, H. marismortuni,
Haloferax volcanii, and Haloferax mediterranei are
grouped as one species called “other halophiles”
hereafter, because only a small number of their
proteins are available.