title: Genetic heterozygosity in pneumococcal transformation.
mesh_terms: D000483:Alleles; D062365:Aminobenzoates; D002999:Clone Cells / Q000032:analysis; D004261:DNA Replication; D004352:Drug Resistance, Microbial; D006579:Heterozygote; D006720:Homozygote; D009154:Mutation; D009578:Nitrobenzenes; D013296:Streptococcus pneumoniae; D013424:Sulfanilamides; D014170:Transformation, Genetic; D014465:Ultrasonics; D014466:Ultraviolet Rays
chemical_list: D062365:Aminobenzoates; D009578:Nitrobenzenes; D013424:Sulfanilamides