PubMed Health⌕ Search

SEARCH · PubMed Health

Results for “CITROVORUM FACTOR”

Explore indexed PubMed citations for clinical trials, systematic reviews and public health research. Read source abstracts and follow each citation to its original PubMed record.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 469 records · Page 26Linked to original sources
PubMed1963

EFFECT OF ALANINE AND THREONINE ON THE SYNTHESIS OF SERINE BY LEUCONOSTOC MESENTEROIDES.

O'Barr, Thomas P. (Agricultural Research Service, Washington, D.C.). Effect of alanine and threonine on the synthesis of serine by Leuconostoc mesenteroides. J. Bacteriol. 86:1321-1325. 1963.-Growth of Leuconostoc mesenteroides in the absence of serine was inhibited by l-alanine and l-threonine. Varying the glycine concentration when l-alanine was present suggested a direct relationship between the molar ratio of these two amino acids and the amount of growth achieved by the test organism. Supplements of leucovorin did not reverse the effect of l-alanine upon growth. In experiments with washed cells of L. mesenteroides, both l-alanine and l-threonine reduced the amount of C(14)-labeled formate fixed into serine and the amount of glycine-1-C(14) found in boiling-water extracts of the cells. Neither l-alanine nor l-threonine had any inhibitory effect upon the glycine-dependent disappearance of formaldehyde by acetone powders prepared from L. mesenteroides.

Alanine↗
PubMed1964

ELECTRON MICROSCOPY OF LATENT PSITTACOSIS VIRUS IN MCCOY CELLS.

Kajima, Masahiro (University of Notre Dame, Notre Dame, Ind.), Nehama Sharon, and Morris Pollard. Electron microscopy of latent psittacosis virus in McCoy cells. J. Bacteriol. 88:709-715. 1964.-Replication of psittacosis virus in McCoy cells was observed periodically by electron microscopy, and was correlated with the appearance of inclusion bodies in infected cells stained by acridine orange fluorochrome. Three well-defined morphological stages characterized the replication cycle: (i) noninfectious initial body, (ii) noninfectious intermediate body, and (iii) infectious mature or elementary body. When replication of virus was interrupted by aminopterin, the virus failed to develop beyond the noninfective initial body stage; however, after treatment of such cultures with folinic acid, intermediate and mature virus particles appeared in the cells. Latent psittacosis virus, as described here, represented a virus in which the replication process was interrupted at a noninfective (eclipse) stage of the developmental cycle.

Acridines↗