GENE KNOCKOUTS WHICH ARE COMPATIBLE WITH VIABILITY GENE KNOCKOUTS SHOWING NO APPARENT EFFECT OF THE GENE ON PHENOTYPE GENE KNOCKOUTS CLASSIFIED ACCORDING TO THE PRIMARY ORGAN SYSTEM(S) AFFECTED: CARDIOVASCULAR SYSTEM DIGESTIVE SYSTEM ENDOCRINE SYSTEM EYE GASTROINTESTINAL TRACT HEMATOPOEITIC SYSTEM IMMUNE SYSTEM AND INFLAMMATORY RESPONSES MUSCULOSKELETAL SYSTEM NERVOUS SYSTEM ORGANS OF SPECIAL SENSE REPRODUCTIVE SYSTEM RESPIRATORY SYSTEM SKIN AND/OR INTEGUMENT URINARY SYSTEM MULTIPLE ORGAN SYSTEMS GENE KNOCKOUTS SHOWING A ROLE OR IMPACT OF THE GENE ON: TUMORIGENESIS GROWTH MISCELLANEOUS