Columbia subject headings:
Harvard subject headings:
Enzymes--Congresses.
Hemoglobin--Congresses.
Structure-activity relationship (Biochemistry)--Congresses.
Sulfur--Metabolism--Congresses.
Princeton subject headings:
Drugs--Structure-activity relationships--Congresses.
Enzymes--Congresses.
Hemoglobin--Congresses.
Structure-activity relationships (Biochemistry)--Congresses.
Sulfur--Metabolism--Congresses.