The protein core of proteoglycan is rich in ___________
(a) Serine and threonine
(b) Serine and methionine
(c) Threonine and methionine
(d) Alanine and serine
I have been asked this question during a job interview.
Origin of the question is Glycoconjugates: Proteoglycans, Glycoproteins and Glycolipids topic in section Enzymes, Carbohydrates and Gycobiology of Biochemistry