| modifier gene | A nonallelic gene that controls or changes the manifestation of a gene by interfering with its transcription. (05 Mar 2000) |
|---|
| biological response modifier | <pharmacology, oncology> A substance used in adjuvant therapy that takes advantage of the bodys own natural defense mechanisms to inhibit the growth of a tumour. (16 Dec 1997) |
|---|---|
| effect modifier | A factor that modifies the effect of a putative causal factor under study; e.g., age is an effect modifier for many conditions. (05 Mar 2000) |