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91.
92.
NEW ARGININE-CONTAINING PEPTIDES ISOLATED FROM CHLORELLA CELLS 总被引:1,自引:0,他引:1
Seven kinds of arginine-containing peptides were isolated fromthe cells of Chlorella ellipsoidea, and their structures wereinvestigated. Their amino acid make-ups and quantities presentin randomly grown algal cells were found to be as follows (indecreasing order of contentin moles per dry weight of cells): Arg-Arg, Arg-Arg-Glu, Arg-Arg-Arg, Arg-Glu> Arg-(Arg2, Glu)-Glu>Arg-(Arg3,Glu), Arg-(Glu, Asp) Using synchronously mass-cultured algal cells, the quantitiesof these peptides as they changed during the algal life cyclewere followed. It was found that, except in the case of Arg-Arg-Arg,the contents (in moles per dry weight of cells) of the peptides(i) markedly increased during the stages from Dn to L1, (ii)remained almost constant or more or less appreciably increasedduring the stages from L1 to L3, and (iii) decreased sharplyduring the transformation of L3-cells (via L4) into Dn-cellsin the dark. The content of Arg-Arg-Arg remained almost constantduring the period from Dn to L3, and on transference of L3-cellsin the dark it increased temporarily and then decreased duringthe transformation of L4-cells into Dn-cells. Significance andpossible roles of these peculiar peptides in the life cycleof Chlorella were discussed. (Received May 10, 1965; ) 相似文献
93.
By growing Chlorella ellipsoidea synchronously by the techniqueof TAMIYA et al. with some modifications, it was demonstratedthat cellular division of ripened cells (L2- and L3-cells) inthe dark is specifically inhibitedespecially stronglyat pH 6.3by cupric ion present in the medium. The possibleattack site of cupric ion in cellular division of this algais discussed. (Received March 12, 1969; ) 相似文献
94.
HIROMICHI NAGASAWA AKIRA ISOGAI AKINORI SUZUKI SABURO TAMURA HIRONORI ISHIZAKI 《Development, growth & differentiation》1979,21(1):29-38
A simple and highly reproducible procedure for partial purification of prothoracicotropic hormone (PTTH) was established starting with 96,000 male adult Bombyx heads. Approximately 28,500-fold purification of PTTH was accomplished with a yield of about 50% and 6 ng of the most purified preparation ("highly purified PTTH") caused adult development in a brainless Samia pupa. The peptidal nature of PTTH was reconfirmed through the effects of various enzymatic and chemical treatments on the biological activity of "highly purified PTTH". Gel-filtration indicated the molecular weight of PTTH to be 4,400. 相似文献