Using a combination of reversed-phase HPLC and electrospray mass spectrometry, peptidomic analysis of norepinephrine-stimulated skin secretions of the American bullfrog Lithobates catesbeianus Shaw, 1802 led to the identification and characterization of five newly described peptides (ranatuerin-1CBb, ranatuerin-2CBc, and -CBd, palustrin-2CBa, and temporin-CBf) together with seven peptides previ...

The northern red-legged frog Rana aurora aurora and the California red-legged frog Rana aurora draytonii are traditionally classified together in the same species group. Ten peptides with antimicrobial activity were isolated from norepinephrine-stimulated skin secretions of R. aurora draytonii and purified to near homogeneity. The peptides were identified as belonging to the ranatuerin-2 family...

Six antimicrobial peptides designated dybowskins were isolated from the skin secretion of Rana dybowskii, an edible frog in Korea. Dybowskin-1 (FLIGMTHGLICLISRKC) and dybowskin-2 (FLIGMTQGLICLITRKC) were isoforms differing in only two amino acid residues at the 7th and 14th positions from the N-terminus, and they showed amino acid sequence similarities with ranalexin peptides. Dybowskin-3 (GLFD...

RESUMO No consórcio entre hortaliças pouco se conhece sobre as respostas fisiológicas. Conhecer o comportamento fisiológico é fundamental para avaliar a eficiência dessas espécies. Sendo assim, objetivou-se fisiológicas da rúcula consorciada com nirá sob diferentes arranjos espaciais e épocas de cultivo. O experimento foi conduzido no delineamento em blocos casualizados, esquema parcela subdivi...

Soluble interleukin 2 receptor (sIL-2R) levels reflect mononuclear cell activation and are elevated in a variety of autoimmune, neoplastic and infectious conditions. Several investigators have studied sIL-2R levels in patients with Type I diabetes mellitus (IDDM), but results have been conflicting. Our primary objective in this study was to compare sIL-2R levels of children and adolescents with...

Activation of T lymphocytes leads to the expression of interleukin-2 receptors (IL-2R) on the cell surface (1) as well as the release of soluble IL-2R (sIL-2R) molecules into the circulation (2). T lymphocytes are the predominant IL-2R bearing cells (3) and hence serum sIL-2R level provides a satisfactory indicator of T-cell activation in vivo. Elevated serum levels of sIL-2R have been reported...

IL-2 is a cytokine that functions as a growth factor and central regulator in the immune system and mediates its effects through ligand-induced hetero-trimerization of the receptor subunits IL-2R alpha, IL-2R beta, and gamma(c). Here, we describe the crystal structure of the trimeric assembly of the human IL-2 receptor ectodomains in complex with IL-2 at 3.0 A resolution. The quaternary structu...

A system for the detection of soluble IL-2R by sandwich enzyme linked immunosorbent assay (ELISA) was established. This assay system has good reproducibility, and was found to be specific for soluble IL-2R by examination of the binding of anti-IgM antibody or anti-IL-2R monoclonal antibody (mAb) with IgM or soluble IL-2R and inhibition by IL-2 of the binding of anti-IL-2R mAb to soluble IL-2R. ...