GlycoproteinsㅡLipoproteins Flashcards
A ______________ is a protein that contains carbohydrates or carbohydrate derivatives in addition to amino acids.
glycoprotein
The presence of carbohydrate units (mostly glucose, galactose, and their disaccharides) attached by glycosidic linkages to _____ at its
5-hydroxylysine residues causes ______ to be classified as a glycoprotein.
collagen
The function of the carbohydrate groups in collagen is related to cross-linking; they
direct the assembly of collagen triple helices into more complex aggregations
called _________.
collagen fibrils
An ___________ is a glycoprotein produced by
an organism as a protective response to the invasion of microorganisms or foreign
molecules.
immunoglobulin
An ________ is a foreign substance, such as a bacterium or virus, that invades the human body.
antigen
An _________ is a biochemical molecule that counteracts a specific antigen.
antibody
A ____________ is a conjugated protein that contains lipids in addition to amino acids. The major function of such proteins is to help suspend lipids and transport them through the bloodstream.
lipoprotein
A ______________ is a lipoprotein that is involved in the transport system for lipids in the bloodstream. These proteins have a spherical structure that involves a central core of lipid material (triacylglycerols and cholesterol esters) surrounded by a shell (membrane structure) of phospholipids, cholesterol, and proteins.
plasma lipoprotein
Their function is to transport dietary triacylglycerols from the intestine to the liver and to adipose tissue.
Chylomicrons
Their function is to transport triacylglycerols synthesized in the liver to adipose tissue.
Very-low-density lipoproteins (VLDL)
Their function is to transport cholesterol
synthesized in the liver to cells throughout the body.
Low-density lipoproteins (LDL)
Their function is to collect excess cholesterol from body tissues and transport it back to the liver for degradation to bile acids.
High-density lipoproteins (HDL)
