The four axial histidine ligands of heme bH and heme bL (His82, His96, His183, and His197) are considered as invariable, because the loss of either heme bH or heme bL would abolish the electron transfer across the membrane leading to an incomplete Q cycle.
As the object of this study was to analyse the effect of variations in infrastructure performances, the weight of each destination was considered as an invariable value (2006 population).
The other factors involved in soil formation are considered to be relatively invariable.
High-grade prostatic intraepithelial neoplasia, previously considered to be an invariable precursor lesion of PCa and commonly found in association with PCa, does not always proceed to invasive carcinoma and, when it does, this may develop decades later (Montironi et al, 2002).
For the paralinear distance analyses, the proportion of invariable sites in the considered alignment was estimated using likelihood and assuming a HKY85 + gamma + proportion of invariable sites model of DNA evolution.
Conventional normalized least mean square (ISS-NLMS) algorithm using invariable step size was considered as one of the effective methods for channel estimation due to its easy implementation [4].
The models denoted by +I imply that a fraction of data set is assumed to be invariable, where +G is considered to categorize the change of substitution rates among sites in discrete gamma distribution.
The non-coding region between np 5160 and np 5191 was not considered, but we checked that it was invariable.
Both point estimates and model averaged estimates of base frequencies, relative substitution rates, transition/transversion rate ratio (ti/tv), the alpha shape of the gamma distribution for rate variation among sites (a), the proportion of invariable sites (pinv), and parameter importance were considered (see Posada and Buckley 2004).
We concentrate on pores with neutral surfaces and invariable diameters, whose rich variety of phases are considered to originate from pure geometric frustration.
