disulfide bonds

[medbunny56]

intramolecular DS bonds refers to stabilizing tertiary structure and intermolecular DS bonds stabilize quartenary structure, is this correct?

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[laczlacylaci]

Yeah, you can think of it that way. It's important to just know that 4° is the stabilization between multiple subunits (ie. Heme) 123° are all just intraspecific stuff (h bonding, hydrophobic, peptide...)

 

[aldol16]

Not necessarily, even assuming there's a clear definition of "intramolecular" and "intermolecular" here. A protein is a macromolecule and may have multiple subunits that are held together by disulfides - but a protein is still considered a macromolecule since everything is normally covalently connected.