3d protein model

Scientific 3D model of a generic receptor tyrosine kinase (RTK), as ONE continuous protein chain. Show ONE extracellular domain in BLUE at the top, ONE transmembrane helix in GREEN crossing a horizontal GRAY phospholipid bilayer, and ONE intracellular domain in RED below the membrane, containing the tyrosine kinase domain. Add ONE small YELLOW ligand attached to the extracellular binding site. Keep all parts connected in their correct order. Clearly separate extracellular space, membrane, and cytoplasm. Realistic protein structure, clean proportions, centered, isolated on a white background. Do not add extra chains, transmembrane segments, domains, or unrelated structures.