Mass spectrometric determination of the amino acid sequence in arginine-containing peptides

aa, a-a a- a aa - aa a -a .     

Studies on rII region of T2L phage

rII T2L , rII T4B. rII T2L rII T4B. T2L rII T4B.     

G-band patterns as chromosomal markers,and the interpretation of chromosomal evolution in wild sheep (Ovis)

- . Ovis musimon (2n=54) O. orientalis (2n=54) - - -O. canadensis mexicana (2n=54) O. musimon x O. canadensis ₁₂ - . ₂ 27 . - .

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Supported by National Science Foundation Grant no. GB 32114X and the Sprague Foundation. We thank Dr. T. C. Hsu for assistance in making the chromosome preparations and for advice and encouragement. The Trustees of the Rachelwood Wildlife Research Preserve generously allowed the biopsy of specimens of their custody. Mr.Arthur Popham kindly provided the specimens from Iran while Dr.R. M. Robinson obtained biopsies from the desert sheep.     

Responses of resistance and capacitance vessels at various frequency electrical stimulation of sympathetic nerves

Conclusion (1) The maximal reactions of cerebral resistance vessels arise at the stimulation frequency of 30 cps, the maximal reactions of capacitance vessels at the frequency of 10 cps. (2) Reactions of resistance vessels in the pulmonary lobe increase in the range of stimulation frequencies from 11–50 cps, maximal reactions of pulmonary capacitance vessels are observed at the frequency of 30–40 cps. (3) Reactions of resistance vessels situated below the abdominal aorta bifurcation increase progressively in the range of frequencies from 6–50 cps, the magnitude of capacitance vessel reaction reaching its maximum value at 20 cps.

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30 /, — 10 /. 50 /. 30–40 /, 20 /.

     

The effect of chloramphenicol analogs on protein biosynthesis in a cell-freeEscherichia coli B system

a aaa a aa aa a a E. coli aa, a aa aa a , a a aa - a .

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Laboratory of Biological Investigations.

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Laboratory for Chemistry of Antibiotics.     

Mutual replaceability of amide and ester groups in biologically active peptides and depsipeptides

, .     

Some functional characteristics of the electroreceptors (the ampullae of lorenzini) of elasmobranchs

. . , ( I) , ( )- .     

The tonically acting pulmonary receptors innervated by C fibres

. , , , , . (, ) . . .     

DNA synthesis and mitoses in atrial myocytes of rats with aortal stenosis

, . 2- , 1,60 ±0,59% , 0,96 ± 0,44% — . ë . , ³- .     

Interaction between ‘Liquoid’ (sodium polyanetholsulphonate) and lysozyme in the immune haemolytic reaction

Riassunto È stato osservato che il lisozima provoca lisi di emazie sensibilizzate in presenza di un reagente per la titolazione di C'₃, preparato con siero di cavia trattato con Liquoid. È stato studiato il meccanismo di tale azione ed è stato dimostrato che essa è dovuta alla formazione di complessi tra il lisozima ed il Liquoid fissato dalle globuline del siero fornite di attività di C'₃. Tale azione del lisozima è indipendente dall'attività enzimatica in quanto anche il metil-lisozima ed il solfato di protamina provocano lo stesso fenomeno.     

Inhibition of sodium transport in frog skin by cardiac glycosides of different molecular structure

p 19-OM no- . ; — .     

Cellular antigens in myxo- and paramyxoviruses as revealed by immunodiffusion methods

, , . , .     

Extrapyramidal pathways with monosynaptic effects upon primate α-motoneurons

, , , , , -.     

X-ray research for polycrystals. The formation geometry of instrumental width of the diffractional line at the investigation of the polycrystals in the translucent X-rays

: , , , - , ().     

The use mitochondrial mutants of yeast in the screening for new antimetabolites

Candida utilis Torulopsis globosa, , . T. globosa II-, 5% , .     

A new synthetic method of coumestan derivatives

Zusammenfassung Die Synthese von 7-Hydroxy-5,6-dimethoxybenzofurano[3,2:3,4]coumarin aus 7,2-Dihydroxy-oder 7-Benzyloxy-2-hydroxy-4,5-dimethoxyisoflavon wird beschrieben.     

A study of excitation-contraction coupling in frog tonic muscle fibers ofRana temporaria

, , , , - .     

Responses of the resistance and capacitance vessels reflexly induced from the cardiac chambers

( ). , .     

Do the respiratory muscles and lung receptors influence the respiratory sensitivity to CO2?

, CO₂. CO₂ CO₂ , . , CO₂, CO₂ . , , CO₂, CO₂ .     

2-Amino-6-[(1'R,2'S)-1',2'-dihydroxypropyl]-3-methyl-pterin-4-one,a biologically active metabolite from the anthozoanAstroides calycularis Pallas

Summary 2-Amino-6-[(1'R,2'S)-1',2'-dihydroxypropyl]-3-methyl-pterin-4-one (1) has been isolated from the marine anthozoanAstroides calycularis; its structure was illustrated by spectral analyses including 2D-NMR and by partial synthesis.1 appears to possess cell-growth inhibiting activity.29 December 1986Work supported by C.N.R. (Progetto Finalizzato Chimica Fine e Secondaria) and by Ministero Pubblica Istruzione Italy. — Acknowledgments. Mass spectral data were provided by Servizio di Spettrometria di massa del C.N.R. e dell'Università di Napoli. The assistance of the staff is gratefully appreciated. Finally we would like to thank Prof. C. Pietropaolo for supplying chick embryo fibroblasts.