Villus growth and cell replacement in the small intestine of the neonatal pig

Summary Cells produced in the crypts of newborn pig ileum migrate onto villi during development. There is little or no corresponding loss of cells from villus tips during the first week of postnatal life. Villus growth during this period is largely responsible for the slow rate of cellular renewal seen to take place.     

Immunochemical identification of vitellogenin in the serum of the newtTriturus cristatus

Summary The hematic yolk precursor — vitellogenin — has been identified immunochemically in the serum of estrogenized females of the newtTriturus cristatus by employing an antiserum prepared against yolk proteins.     

The effects of oxamate on the contractility of isolated rat atria

Zusammenfassung Oxamat, das die Lactat-Dehydrogenase hemmt, erniedrigt die Kontraktionsfähigkeit des Vorhofs mit und ohne Anwesenheit von Glucose im Medium und bei Hinzufügung von 2-DG oder Atropin. Hohe Konzentration von Pyruvat erhöht die Depression von Oxamat auf den Vorhof im Glucose-Milieu. Oxamat sensibilisiert das Gewebe für funktionellen Abbau durch Glycolyse.

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This research was supported by grants No. 1441 and No. HE-994801 from Consejo Nacional de Investigaciones de la República Argentina, and from the National Institute of Health, respectively.

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Research Fellow from the Consejo Nacional de Investigaciones de la República Argentina.

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Established Investigator from the Consejo Nacional de Investigaciones de la República Argentina.     

Über die Bindungsart der amidierten Reste derβ-Aminodicarbonsäuren in Eiweißstoffen

Summary Gliadin and chymotrypsinogen, respectively, were treated with alkaline sodium hypochlorite solution equivalent to the carbonamide groups present, and then hydrolysed by acid. The proteins treated with dilute alkaline solution have been assayed in control experiments for their content of N-terminal amino acids. The degradation products identified by paper chromatography seem to indicate that in chymotrypsinogen the amido groups of the amino dicarboxylic acids represent asparaginyl (Ia) and glutaminyl (Ib) residues. In gliadin, besides these residues, the presence of isoglutaminyl residues (IVb) also seems to be probable.