fatlike

It is a yellowish, fatlike mass, transparent in thin layers, and somewhat fluorescent.

Two more are phosphatides (a type of phosphorus-containing fat molecule), and a fifth is a cerebroside (a complex sugar-containing fatlike molecule).

Cholesterol is a type of lipid, which is a group of fats and fatlike substances found in your body and in the foods you eat.

The organism cloaks its protein structure in a veil of fatlike material, a stratagem that denies obvious targets both to the immune system and to vaccine-makers.

It appears to consist of a double layer of phosphorus-containing fatlike molecules (phospholipid), coated on each side with a single thickness of protein molecule.

"This is a great day for me," said Mr. Singer, who discovered the fatlike protein substance in 1979 as he was researching alternative uses of the byproducts of cheese-making.

Because Dr. Doyle wanted to measure the lipids - fatlike substances - after an overnight fast to get a more accurate reading, he paid a house call to Mr. Kerry in Boston on Sept. 18 to draw blood for a new set of tests.