An important question in protein evolution is to what extent proteins may have undergone swaps (switches of domain or fragment order) during evolution. Such events might have occurred in several forms: Swaps of short fragments, swaps of structural and functional motifs, or recombination of domains in multidomain proteins. This question is important for the theoretical understanding of the evolu...

Assignment of all transcription factors (TFs) from genome sequence data is not a straightforward task due to the wide variation in TFs among different species. A DNA binding domain (DBD) and a contiguous non-DBD with a characteristic SCOP or Pfam domain combination are observed in most members of TF families. We found that most of the experimentally verified TFs in prokaryotes are detectable by...

This is the first of two articles that will examine the effect that the Old-Age, Survivors, and Disability Insurance (OASDI--Social Security) and the Supplemental Security Income (SSI) programs have in maintaining the income of poor and near poor families with children at a level that is at least equal to the poverty threshold. The articles also will evaluate the extent to which these programs ...

the selection of high yielding and stress tolerance plant genotypes with the highest water use efficiency and productivity is one of the most important tools for field water management in arid and semi-arid regions. this study was conducted to identify drought tolerant flax families with the highest irrigation water productivity (iwp) among a population of 119 f3 families derived from a cross b...

internationally early intervention programmes for infants and preschoolers with disabilities have proved to be remarkably successful. in many countries, they began with teachers for visually impaired or hearing impaired children visiting the family home to teach parents how they could overcome the child's impairments. the logic of early intervention was inequitable. for example, the sooner...