descriptor  643122 rec.
   |__allele descriptor 392897 rec.
   |   |__allele class(+) 10953 rec.
   |   |__mutant scorability rank(+)
   |   |__origin of mutation(+) 290170 rec.
   |   |__phenotypic class(+) 180203 rec.
   |__balancer descriptor
   |   |__single balancer
   |__dataset descriptor 9 rec.
   |   |__dataset attribute(+) 9 rec.
   |   |__dataset data type(+)
   |   |__dataset entity type(+)
   |__experimental tool descriptor 2472 rec.
   |   |__binary expression system component(+) 75 rec.
   |   |__cell labeling tool(+) 31 rec.
   |   |__cell viability regulation tool(+) 20 rec.
   |   |__engineered regulatory region(+) 17 rec.
   |   |__gene product activity regulation tag(+) 12 rec.
   |   |__gene product degradation tool(+) 26 rec.
   |   |__gene product detection tool(+) 627 rec.
   |   |__gene product engineering tool(+) 19 rec.
   |   |__gene product localization tag(+) 203 rec.
   |   |__genetically encoded sensor(+) 354 rec.
   |   |__genome engineering tool(+) 519 rec.
   |   |__insertional mutagenesis tool(+) 637 rec.
   |   |__neuron activity regulation tool(+) 89 rec.
   |   |__proximity labeling tool(+) 20 rec.
   |   |__purification tag 15 rec.
   |   |__specific binding tool(+) 291 rec.
   |   |__split system combination
   |   |__split system component(+) 86 rec.
   |__group descriptor 1947 rec.
   |   |__gene or gene product group(+) 1947 rec.
   |__publication descriptor 246167 rec.
       |__publication class(+) 246167 rec.
       |__publication language(+) 214240 rec.