Due to the great length of apolipoprotein (apo) B-100, the localization of lipid-associating domains in this protein has been difficult. To address this question, we developed a computer program called LOCATE that searches amino acid sequences to identify potential amphipathic a-helixes and /3-strands by using sets of rules for helix and strand termination. A series of model chimeric protein te...

Like rat C apolipoproteins, each of the C apolipoproteins from human blood plasma (C-I, C-11, C-111-1, and C111-2) bound to small chylomicrons from mesenteric lymph of estradiol-treated rats and inhibited their uptake by the isolated perfused rat liver. This inhibitory effect of the C apolipoproteins was independent of apolipoprotein E, which is present only in trace amounts in these chylomicro...

The plasma high-density lipoproteins (HDL, rho 1.085-1.21 g/ml) of rainbow trout (Salmo gairdneri) have been shown to contain large amounts of apolipoprotein (apo) AI (Mr 28,000) and several other apolipoproteins of Mr less than 14,000 (apo C-like) and of Mr 37,000-38,000, 44,000-45,000 and 53,000-54,000. Comparison of apo AI from trout and human HDL shows them to be similar in Mr and to have s...

background : the excessive changes in serum of lipids, lipoproteins and apolipproteins can be considered as strong risk factors for cardiovascular diseases.in particularlipoproteins can determine the risk of cardiovascular illnesses in teenyears (before showing clinical symptoms).studies have shown that the serum level of ldl c -hdl c is a function of the productionamount of apoa 1 and apob 100...

Silver-staining of immunoprecipitates extends the sensitivity of the radial immunodiffusion assay by tenfold. This modification permits the quantification of apolipoproteins A-1, A-11, C, and E at levels of 0.2-1.0 mg/d in plasma samples at a sensitivity threshold of 10 ng. The silver-enhanced radial immunodiffusion method is readily adapted from the standard method, simple and inexpensive to p...

We evaluated the impact of antiretroviral-induced dyslipidemia on hepatitis C virus (HCV) biogenesis in human immunodeficiency virus (HIV)/HCV coinfected patients. This study used serum samples from antiretroviral-naive HIV/HCV patients initiating their first regimen as part of AIDS Clinical Trials Group study protocols (A5142, A5202). Initiation of antiretrovirals increased most lipoproteins a...

Using "high-performance" anion-exchange chromatography, we isolated and quantified human C apolipoproteins (apo C) from very-low-density lipoproteins (VLDL) in serum. As revealed by isoelectric focusing and double immunodiffusion against monospecific antisera, apo C-I, apo C-II, apo C-III0, apo C-III1, and apo C-III2 were purified to homogeneity. Assay reproducibility (coefficients of variation...

Purpose: Several studies have been done on the effects of fasting on human health indicating the beneficial effects of fasting on weight control, lipid metabolism, and lowering blood pressure in healthy people. The present study aimed at investigating the effects of Ramadan fasting on apolipoproteins A and B (apo A and B) and the atherogenic index of the fasting and non-fasting students. Metho...