The GC boundaries of each LHGR family were defined according to Bernardi's proposal [10]: two types of GC-poor LHGRs — L1 (<37%) and L2 (37%–41%), and three types of GC-rich LHGRs — H1 (41% 46%), H2 (46% 53%), and H3 (>53%).
The boundaries of the Leu zippers in SlbZIPs were defined according to the criteria used for the Arabidopsis, rice and maize bZIP proteins and the Leu zipper regions were then arranged in the form of heptad repeats, in which the amino acid positions of each heptad was named g, a, b, c, d, e and f in order.
The boundaries of conserved segments between the bovine and human genomes were defined according to a parsimonious interpretation.
The boundary condition of the plate is defined according to the interaction between the webs and face sheets in the presence of the core material by applying a series of numerical analyses using the three-dimensional finite element modeling.
The geographical area of habitat was defined according to the regional administrative boundary into four micro-regions.
Characteristics of these study areas are presented in table 1. Neighbourhood level was defined according to small-scale local administrative boundaries as used in each country except for Hungary.
Here, we chose to use ecoregions because these broad areas are defined according to physiographic and biotic features, and therefore should reflect zoogeographic boundaries more closely.
We chose to use ecoregions because these broad areas are defined according to physiographic and biotic features and, therefore, should reflect biogeographic boundaries more closely than political topographical entities.
Stresses are defined according to the Hooke's law.
