which amino acid was incorporated into compound 1 as a future site of covalent attachment to ha prior to mineralization?

Covalent peptide bonds in the backbone and no covalent interactions among amino acid side chains provide the essential frame work for protein

Ser

Explanation:

I've done this question before.

The answer is Serine.Serine is the residue that was phosphorylated, and phosphorylation enabled the protein to be subsequently attached to hydroxyapatite (HA)

the relative standard reduction potential of the half-cell in which reduction occurs; more positive than the other half-cell. reduction is a chemical process in which electrons are added to an atom or an ion; it always occurs accompanied by oxidation of the reducing agent.

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