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Classification 2024 Winter Edition

Worldwide source of medical classification resources


Biochemistry. Cell Biology and Genetics

  • Classify genetic causes of disease in QZ 50.
  • Classify bacterial and general microbial genetics in QW 51.
  • Classify viral genetics in QW 160.5.
  • Classify fungal genetics in QW 180.
  • Classify plant genetics in QK.

Organizations. Societies (General or not elsewhere classified) (Cutter from name of organization or society) (Table-G)
(Monographs and Serials)

Includes membership lists and administrative reports issued serially or separately. Classify directories in QU 22. Classify other serials issued by societies in W1. For academies and institutes, see QU 23-24.

[This number not used]

Classify works on biochemical phenomena and molecular biology in QU 34.

Collected works by several authors

Collected works by individual authors

Addresses. Essays. Lectures

History (Table-G)

General coverage (Not Table-G)

Dictionaries. Encyclopedias
(Monographs and Serials)

Classification. Terminology
(Monographs and Serials)

Tables. Statistics. Surveys (Table-G)
(Monographs and Serials)

Classify nutrition tables or food value tables in QU 145-145.5. Classify nutrition surveys in QU 146.

General coverage (Not Table-G)
(Monographs and Serials)

Atlases. Pictorial works


Classify here works about education.

Educational materials
(Monographs and Serials)

Classify here educational materials, e.g., outlines, questions and answers, programmed instruction, computer-assisted instruction, etc., regardless of format. Classify textbooks, regardless of format, by subject.

Schools, departments, and faculties of biochemistry, cell biology, or genetics (Table-G)
(Monographs and Serials)

Include here works on the history of schools. Classify courses of study, catalogs, etc., in W 19.5.

General coverage (Not Table-G)
(Monographs and Serials)

Research (General)

Classify here works about research in general. Classify works about research on a particular subject by subject.

Biochemistry as a profession. Cell biology and genetics as a profession. Ethics. Peer review

Directories (Table-G)

General coverage (Not Table-G)
(Monographs and Serials)

Collective laboratories, academies, institutes, etc.

Individual laboratories, academies, institutes, etc. (Cutter from name of institution)

Biological specimen banks (Table-G)

General coverage (Not Table-G)

Laboratory manuals. Technique

Include here cytological techniques in cell biology. Classify works on cytological techniques in clinical pathology in QY 95. Classify techniques associated with a specific type of cell with the cell. Classify works on genetic techniques in QU 550.

Equipment and supplies
(Monographs and Serials)

Classify catalogs here.

Informatics. Electronic data processing. Computers (General)

Classify works on use for special subjects by subject.

Collective museums, exhibitions, etc.

Individual museums, exhibitions, etc. (Cutter from name of institution) (Table-G)

Laws (Table-G)
(Monographs and Serials)

General coverage (Not Table-G)
(Monographs and Serials)

Discussion of law (Table-G)
(Monographs and Serials)

General coverage (Not Table-G)
(Monographs and Serials)

Biochemical phenomena. Molecular biology (General or not elsewhere classified)

Classify works on both the specialty and biochemical phenomena here. Classify works on the specialty only in QU 21.

Handbooks. Resource guides
(Monographs and Serials)

Macromolecular substances (General or not elsewhere classified)

Chemistry of food substances (General)

Nitrogen and related compounds (General or not elsewhere classified)

Proteins (General or not elsewhere classified)

Classify here works on proteins in general or those in foods. Classify works on those that are localized, by site, e.g., eye proteins in WW 101; on those that are enzymes or coenzymes in QU 135-141 or with the system acted upon; on blood proteins in WH or in clinical pathology QY 455; on immunoglobulins in QW 601; on other immunoproteins in appropriate QW number.

Carrier proteins. Intracellular signaling peptides and proteins. Intercellular signaling peptides and proteins

Cytoskeletal proteins. Scleroproteins

Dietary proteins


Heat-shock proteins. Molecular chaperones

Membrane proteins. Cell surface receptors


Protein phenomena

Protein engineering

Transcription factors


Nucleosides. Nucleotides

Nucleic acids and derivatives (General or not elsewhere classified)

Classify works on derivatives acting on blood and blood formation in QV 185.



Amino acids (General or not elsewhere classified)

Amines. Amidines (General or not elsewhere classified)

Classify works on catecholamines in WK 725; on amino alcohols in QV 82-84.

Amides (General or not elsewhere classified)

Heterocyclic compounds(General or not elsewhere classified)

Peptides (General or not elsewhere classified)

Nitrogen fixation




Cf. QY 470 Blood glucose

Polysaccharides and derivatives

Sugar acids. Sugar alcohols. Sugar phosphates (General or not elsewhere classified)

Lipids (General or not elsewhere classified)

Cf. QY 465 under Blood chemical analysis.

Lipid metabolism (General or not elsewhere classified)

Fats. Oils

Hypolipidemic agents

Fatty acids



Steroids. Sterols. Terpenes

Carboxylic acids and their salts and esters (General or not elsewhere classified)

Aldehydes (General or not elsewhere classified)

Body composition

Biological factors

Body fluids

Classify here works on acid-base equilibrium, hydrogen-ion concentration, and water-electrolyte balance in body fluids. Cf. QU 270 Water-electrolyte imbalance, etc.

Growth substances. Growth inhibitors (General or not elsewhere classified)

Classify works on growth hormone at WK 515.

Biological pigments (General or not elsewhere classified)


Classify works on metabolism of a particular substance with the substance, e.g., Metabolism of proteins in QU 55.

Energy metabolism. Calorimetry

Inorganic chemicals (General or not elsewhere classified)

Cf. QY 480 under Blood chemical analysis.

Metals (General or not elsewhere classified)


Trace elements

Organometallic compounds. Organophosphorus compounds (General or not elsewhere classified)

Colloids (General or not elsewhere classified)

Enzymes. Coenzymes (General or not elsewhere classified)

Classify works on enzyme deficiency in QU 246 or with the diseases resulting. Classify works on general enzyme therapy in WB 330.

Hydrolases (General or not elsewhere classified)

Isomerases (General or not elsewhere classified)

Ligases (General or not elsewhere classified)

Lyases (General or not elsewhere classified)

Oxidoreductases (General or not elsewhere classified)

Transferases (General or not elsewhere classified)

Enzyme precursors (General or not elsewhere classified)

Enzyme inhibitors (General or not elsewhere classified)

Enzyme reactivators (General or not elsewhere classified)

Nutrition (General or not elsewhere classified)

Classify works on infant nutrition in WS 115-125; on child nutrition in WS 115-130; on adolescent nutrition in WS 115-132; on geriatric nutrition in WT 115; on maternal and prenatal nutrition in WQ 175; on sports and exercise nutrition in QT 263.

Nutritional requirements

Nutrients. Nutritive values of food

Nutrition policy (Table-G)

General coverage (Not Table-G)

Nutrition surveys (Table-G)

General coverage (Not Table-G)

Vitamins. Avitaminosis (General or not elsewhere classified)

Cf. QY 350 Assay of vitamins; SF 98.V5 Vitamins in animal nutrition.

Fat soluble vitamins

Vitamin A. Vitamin A deficiency

Vitamin D. Vitamin D deficiency

Vitamin E. Vitamin E deficiency

Vitamin K. Vitamin K deficiency

Water soluble vitamins

Vitamin B complex. Vitamin B deficiency (General or not elsewhere classified)

Folic acid



Nicotinic acids. Nicotinamide

Vitamin B12

[This number not used]

Classify works on other factors associated with B vitamins in QU 187-194.

Ascorbic acid


Popular works

Classify here popular works on nutrition.

Nutrition disorders (General or not elsewhere classified)

Classify works on nutrition disorders in infancy and childhood in WS 115-132; in the aged in WT 115.

Malnutrition (General) (Table-G)

General coverage (Not Table-G)

Deficiency diseases (General or not elsewhere classified)

Classify works on hormone deficiencies in WK; on vitamin deficiencies in QU 160-240.

Overnutrition. Overweight. Obesity (General) (Table-G)

General coverage (Not Table-G)

Morbid obesity

Obesity management. Bariatrics

Metabolic diseases (General)

Classify works on diabetes and related conditions in WK 810-850; on achlorhydria in WI 308; on metabolic bone diseases in WE 250.

Specific metabolic diseases, A-Z


Calcium metabolism disorders

Glucose metabolism disorders

Classify works on diabetes mellitus in WK 810-850.

Iron metabolism disorders

Lipid metabolism disorders

Classify inborn errors in QU 265.5.L5.

Mitochondrial diseases

Phosphorus metabolism disorders


Inborn errors of metabolism (General)

Classify works on the hemolytic anemias in WH 170; on chronic idiopathic jaundice in WI 703; on errors of renal tubular transport in WJ 301.

Specific errors or groups of errors not elsewhere classified, A-Z

Amino acid metabolism inborn errors

Classify works on albinism in WR 265.

Carbohydrate metabolism inborn errors

Lipid metabolism inborn errors

Lysosomal storage diseases

Peroxisomal disorders

Purine-pyrimidine metabolism inborn errors

Classify works on gout in WE 350.

Water-electrolyte imbalance

Classify works on water-electrolyte balance and acid base equilibrium in QU 105. Classify works on dehydration in WB 158.

Acid-base imbalance

Classify works on diabetic acidosis in WK 830; on renal tubular acidosis in WJ 301; on respiratory acidosis in WF 140.5.

General works

Cf. QY 95 Cytological techniques. Classify works on cells of a particular tissue or organ with the tissue or organ.

Stem cells

Include here general works on stem cell transplantation. Classify works on stem cells of a specific tissue or organ with the tissue or organ.

Embryonic stem cells

Cellular structures


Cell physiology

Classify physiology of specific cell with the cell.

General works

Classify microbial genetics in QW 51. Classify viral genetics in QW 160.5. Classify plant genetics in QK. Cf. QZ 52 Genetic services.


Classify works on epigenomics in QU 476.

Molecular medicine

Genetic structures

Gene expression. Gene expression regulation

Genetic epigenesis. Epigenomics

Genetic variation

Genetic phenomena

Classify works on genetics in general in QU 450.

DNA damage. DNA repair

DNA replication

Molecular evolution. Genetic selection

Genetic techniques (General or not elsewhere classified)

Specific techniques, A-Z

Chromosome mapping


DNA fingerprinting

Gene expression profiling

Genetic engineering

Mutagenicity tests

Polymerase chain reaction

Sequence analysis

Genetic therapy

Genetic privacy