Although the name of continent was not applied to large portions of land for any physical reasons, it so happens that there is a certain physical similarity or homology between them which is not shared by the smaller islands or peninsulas.
Furthermore, the theory of homology decompositions was developed in a much more general context which will allow further generalizations.
This kinase domain shows approximately 84% homology with the insulin receptor.
The genes for hK2 and PSA are expressed predominately in the prostate, are transcriptionally up-regulated by androgens, and share 78% homology.
Projector thus uses sequence homology directly at DNA level and takes the conservation of gene structures between related genes explicitly into account.