Conjugated molecules

LDL transports cholesterol from the liver to peripheral tissues; excess circulating LDL can oxidize and deposit in arterial walls.

Cytochromes are electron-transporting metalloproteins whose iron center alternates between Fe2+ and Fe3+ states to transfer electrons.

Viral envelope glycoproteins interact with host cell-surface receptors, mediating viral attachment and entry.

O-linked glycosylation occurs through the covalent attachment of an oligosaccharide to the oxygen atom of serine or threonine side chains.

Interferons are signaling proteins (cytokines) released by host cells in response to viral pathogens, and they are glycoproteins.

Chylomicrons are large lipoproteins that absorb and transport dietary triacylglycerols and cholesterol from the intestines into lacteals.

The glycocalyx acts as a cellular fingerprint; individual combinations of sugar chains allow immune cells to distinguish self from non-self.

Human ABO blood group determinants are defined by the structural variations of carbohydrate chains on surface glycolipids and glycoproteins.

Mannose-6-phosphate serves as a specific molecular sorting signal that targets newly synthesized hydrolytic enzymes to the lysosomes.

Galactolipids and cerebrosides, which are types of glycolipids, are heavily concentrated in the nervous system's myelin sheath.

Lipoproteins feature a hydrophilic protein shell that encloses a hydrophobic lipid core, allowing transport in aqueous blood plasma.

Glycoproteins and glycolipids extend their sugar chains outward to form the glycocalyx, which mediates cellular identification.

N-linked glycosylation begins in the lumen of the rough endoplasmic reticulum as polypeptides are being translated by ribosomes.

Conjugated molecules like glycoproteins and glycolipids are stable because their components are bound via permanent covalent linkages.

The Golgi apparatus contains specific glycosyltransferase enzymes that trim and add sugar residues to complete glycoprotein processing.

Hemoglobin is a metalloprotein containing an iron-porphyrin ring system called a heme group as its functional prosthetic group.

Ribosomes are functional structural complexes consisting of ribosomal RNA (rRNA) and specific ribosomal proteins working together.

Mucus contains mucins, which are heavily glycosylated glycoproteins that trap pathogens and protect delicate mucosal surfaces.

Lipopolysaccharides (LPS) contain a lipid A anchor component covalently bound to a core oligosaccharide and an O-antigen chain.