Three 14C-labeled 22-carbon polyunsaturated fatty acids, 7,10,13,16-[14C]docosatetraenoic acid (22:4(n-6)), 7,10,13,16,19-[14C]docosapentaenoic acid (22:5(n-3)), and 4,7,10,13,16,19-[14C]docosahexaenoic acid (22:6(n-3)), were compared with [3H]arachidonic acid (20:4(n-6] and [14C]linoleic acid (18:2(n-6)) to characterize their incorporation into the lipids of Ehrlich ascites cells. The relative...

A graph G is called H-free, if it does not contain H as a subgraph. In 2010, Nikiforov proposed Brualdi-Solheid-Turán type problem: what the maximum spectral radius of an H-free order n? this paper, we consider problem for non-bipartite graphs. Let Ka,b•K3 denote obtained by identifying vertex Ka,b in part size b and K3. We prove that n satisfying ρ(G)≥ρ(K⌈n−22⌉,⌊n−22⌋•K3), then contains all od...

The hypothesis that the last step in the biosynthesis of 4,7,10,13,16,19-22:6 from linolenate is catalyzed by an acyl-CoA-dependent 4-desaturase has never been evaluated by direct experimentation. When rat liver microsomes were incubated with [1-14C]7,10,13,16,19-22:5, under conditions where linoleate was readily desaturated to 6,9,12-18:3, it was never possible to detect the product of the put...