Peripubertal serum dioxin concentrations and subsequent sperm methylome profiles of young Russian adults.

Background: The association of exposure to endocrine disrupting chemicals in the peripubertal period with subsequent sperm DNA methylation is unknown.

Objective: We examined the association of peripubertal serum 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) concentrations with whole-genome bisulfite sequencing (WGBS) of sperm collected in young adulthood.

Methods: The Russian Children's Study is a prospective cohort of 516 boys who were enrolled at 8-9 years of age and provided semen samples at 18-19 years of age.

A 29.5 kDa heat-modifiable major outer membrane protein of Rickettsia prowazekii, putative virulence factor, is a peptidyl-prolyl cis/trans isomerase.

Allelic genes from three Rickettsia prowazekii strains encoding parvulin-like protein (Plp), a heat-modifiable 29.5 kDa major outer membrane protein, were earlier cloned into expression vector pQE 30. In this work, recombinant proteins were overproduced in E.

Loss of SM-B myosin affects muscle shortening velocity and maximal force development.

We used an exon-specific gene-targeting strategy to generate a mouse model deficient only in the SM-B myosin isoform. Here we show that deletion of exon-5B (specific for SM-B) in the gene for the heavy chain of smooth muscle myosin results in a complete loss of SM-B myosin and switching of splicing to the SM-A isoform, without affecting SM1 and SM2 myosin content. Loss of SM-B myosin does not affect survival or cause any overt smooth muscle pathology.