title: Familial lack of the IgG3 subclass: gene elimination or turning off expression and neutral evolution in the immune system.
mesh_terms: D000293:Adolescent; D000328:Adult; D000483:Alleles; D005075:Biological Evolution; D004261:DNA Replication; D004406:Dysgammaglobulinemia / Q000235:genetics*; D005796:Genes; D005838:Genotype; D006801:Humans; D017099:IgG Deficiency; D007126:Immunoglobulin Allotypes / Q000235:genetics*; D007074:Immunoglobulin G / Q000235:genetics; D008875:Middle Aged; D010641:Phenotype
chemical_list: D007126:Immunoglobulin Allotypes; D007074:Immunoglobulin G