TGF-beta exerts its influence by binding to type I and type II TGF-beta receptors , thereby forming a complex and activating specific downstream effector molecules .
B-GeneOrGeneProduct O O O O O O B-GeneOrGeneProduct I-GeneOrGeneProduct I-GeneOrGeneProduct I-GeneOrGeneProduct I-GeneOrGeneProduct I-GeneOrGeneProduct I-GeneOrGeneProduct O O O O O O O O O O O O