National Repository of Grey Literature 7 records found  Search took 0.00 seconds. 
Distribuce a degradace oostatických peptidů v masařce Neobellieria bullata
Hlaváček, Jan ; Bennettová, Blanka ; Slaninová, Jiřina ; Černý, B. ; Vlasáková, Věra ; Holík, Josef ; Ježek, Rudolf ; Tykva, Richard
Distribution and degradation of oostatic peptides in the selected organs of flesh fly Neobellieria bullata was investigated using tritium labeled molecules. The degradation of peptides proceeded fast at both the amino and carboxy termini and resulted in formation of transient tetra and tripeptide sequences.
Metabolické odštěpování N- a C-koncových aminokyselin z hmyzího oostatického peptidu H-Tyr-Asp-Pro-Ala-Pro-OH
Tykva, Richard ; Slaninová, Jiřina ; Bennettová, Blanka ; Hlaváček, Jan ; Černý, B. ; Vlasáková, Věra ; Němec, Václav
Using incubation of fresh hemolymph from model insect Neobellieria bullata (Diptera) and the pentapeptide radiolabeled in the N– or C– terminal amino ends, we measured the time course of cleavage of the relevant amino acids by radio-HPLC.
Syntéza a využití peptidů obsahujících 3,4-dehydroprolin
Hlaváček, Jan ; Bennettová, Blanka ; Černý, B. ; Vlasáková, Věra ; Slaninová, Jiřina ; Holík, Josef ; Tykva, Richard
The series of peptides containing 3,4-dehydroproline prepared was tritiated and used in the study on degradation of oosatic peptides.
Binding sites for oostatic peptides in organs of fly .I.Neobellieria bullata./I..
Nazarov, Elšan ; Holík, Josef ; Tykva, Richard ; Hlaváček, Jan ; Bennettová, Blanka ; Slaninová, Jiřina
Using tritiated peptides Asp-Pro, Tyr-Asp-Pro-Ala, Tyr-Asp-Pro-Ala-Pro binding experiments with homogentates on membrane preparations of ovaries were performed. Very low degree of specific binding was detected.
Conditions for following the metabolism of oostatic peptides in .I.Neobellieria bullata./I. by mass spectrometry and radiolabelling
Tykva, Richard ; Šimek, Petr ; Bennettová, Blanka ; Holík, Josef ; Hlaváček, Jan ; Havlíček, Libor
Metabolism of peptides with proven effect on the egg development has been studied after injection of radiolabelled sequences into flies .I.Neobellieria bullata./I..
Proline-rich peptides
Hlaváček, Jan ; Mařík, Jan ; Bennettová, Blanka ; Tykva, Richard
Proline-rich peptides and proteins exhibits outstanding behaviour due to the cis-trans isomerism on Xaa-Pro bonds. An effect of cumulated proline residues on insect reproduction was studied in oostatic decapeptide and its shortened analogues with accelerated and enhanced oostatic activity.
The fate of an oostatic peptide or its analogs including metabolites in insects Diptera and Orthoptera and its transformation to the next generation
Tykva, Richard ; Bennettová, Blanka ; Hlaváček, Jan ; Němec, Václav
The studies on freshly emerged insect females demonstrate that oogenesis is strongly affected by injection of the oostatic decapeptide and its synthetic analogs with a decreased number of proline residues.

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