Stretch said it found "no evidence of systematic political bias" in either the selection or prominence of stories included in the feature.
Three types of error are common in validation studies: sampling error due to small sample sizes, poor measurement precision in either the selection tool or the undergraduate assessment tool, and restricted range of scores [ 1].
The Rex-Neor and Rex-Blar selection cassettes were used to create stable αMHC-Puror hESC lines that have been maintained for over 25 passages without any detectable decrease in efficacy of either selection cassette.
Stable cell lines were isolated following viral transductions by either selection in the appropriate antibiotics for 1-2 weeks (0.5 μg/mL puromycin; 50 μg/mL hygromycin; 100 μg/mL) or by flow sorting using dual-laser FACSCalibur.
The finding of widespread positive selection in Rubisco suggests that either selection still continues to improve performance of this ancient critically important enzyme, or that adaptive evolution in rbcL may reflect the fine-tuning of Rubisco to optimize its performance in various gaseous and thermal conditions [ 4].
For sake of completeness, we provide the results of all analyses, but we focus in particular on the branch-site test of positive selection, the most appropriate for detecting candidate genes under positive selection in either the C. resedifolia or the C. impatiens lineage (see below).
For each PANTHER category, we computed the probability of overrepresentation and underrepresentation of genes with positively selected promoters, genes with positively selected coding regions and genes with positive selection in either the promoter or the coding regions.
In both CB4856 and CB4858, based on a measure of the strength of selection (ka/ks), all the chromosomes are under negative selection and in CB4856, there is no difference in the strength of natural selection in either the autosomes versus X or between any of the chromosomes.
Responses to open-ended questions were recorded in English either by selection from a list of predefined answer categories or in writing if the particular response was not listed.
However, both our study and the previous study [41] of the HGDP-CEPH fail to identify LCT as a candidate gene for recent positive selection in either the European regional group or in any of the individual European populations (with the exception of Orcadians in our study).
The second arm was allowed to proceed in an entirely respondent-driven manner with study staff not being directly involved in either the primary seed selection or the secondary recruitment.
