41. Myoglobin was the first protein to have its three-dimensional structure revealed by X-ray crystallography. 42. A classification of cytokine receptors based on their three-dimensional structure has, therefore, been attempted. 43. In some cases, IDPs can adopt a fixed three-dimensional structure after binding to other macromolecules. 44. Proteins and nucleic acids fold into complex three-dimensional structures which result in the molecules'functions. 45. The second type, polypropylene, is a three-dimensional structure with a backbone of carbon atoms. 46. Zeolite minerals are crystalline, hydrated aluminosilicate of alkali and alkaline cations with a three-dimensional structure . 47. It gives colour either due to the pigments contained within it or through its three-dimensional structure . 48. The properties of excitons and other quasiparticles are also studied, as well as quantum-dimensional structures . 49. The Tonejet printhead is a three-dimensional structure consisting of side walls, flow channels and ejectors. 50. Then in the 1990s, he worked with crystallographers to clarify the three-dimensional structure of the enzyme.