Columbia subject headings:
Peptides--Synthesis--Periodicals.
Proteins--Periodicals.
Proteins--Research--Periodicals.
Harvard subject headings:
Peptides--Periodicals.
Proteins--Periodicals
Princeton subject headings:
Peptides--Periodicals.
Peptides--Synthesis--Periodicals.
Periodicals.
Proteins--Periodicals.
Proteins--Research--Periodicals.