A study of the distribution of phylogenetically conserved blocks within clusters of mammalian homeobox genes

Genome sequencing efforts of the last decade have produced a large amount of data, which has enabled whole-genome comparative analyses in order to locate potentially functional elements and study the overall patterns of phylogenetic conservation. In this paper we present a statistically based method for the characterization of these patterns in mammalian DNA sequences. We have applied this approach to the study of exceptionally well conserved homeobox gene clusters (Hox), based on an alignment of six species, and we have constructed a map of Hox cataloguing the conserved fragments, along with their locations in relation to the genes and other landmarks, sometimes showing unexpected layouts.     

Sexual Activity and Reproductive Isolation Between Age‐specific Selected Populations of Seed Beetle

We evaluated the degree of reproductive isolation between laboratory populations of the seed beetle (Acanthoscelides obtectus) selected to reproduce early (E) or late (L) in life, where different levels of sexual activity and sexual discrimination have been detected. We found a significant level of behavioral isolation among populations within the E selection regime in which beetles showed enhanced early‐life fitness traits and low sexual activity. In contrast, substantially higher levels of sexual activity and an indiscriminate mating system inhibited rather than promoted pre‐zygotic isolation between the L populations. Our results indicate that the study of sexual activity levels may be crucial for understanding the first steps in the pre‐zygotic isolation among allopatric populations subjected to uniform selection.     

Protein patterns during final differentiation of some rat organs

Development Genes and Evolution -     

Reduced complexity of activity patterns in patients with Chronic Fatigue Syndrome: a case control study

Objective  

We examined developmental aspects of the emotional awareness of adolescents by evaluating their responses to a self-reported questionnaire based on the Toronto Alexithymia Scale-20 (TAS-20).     

Untersuchung über Pflanzenreste aus den Ausgrabungen bei Sadowetz in Bulgarien

Ohne ZusammenfassungEine ausführliche Arbeit ist in bulgarischer Sprache im Jahrbuch der Universität Sofia, Bd. XXXIV, 1937/1938, S. 33–51, erschienen.