The phrase "a complex mixture of molecules" is correct and usable in written English.
It can be used in scientific or technical contexts when describing substances that consist of various types of molecules combined together.
Example: "The solution contained a complex mixture of molecules, including proteins, lipids, and carbohydrates, which contributed to its unique properties."
Alternatives: "a diverse array of molecules" or "a complicated blend of molecules".
Downstream processing of biochemical products requires recovery from a complex mixture of molecules, impurities and contaminants by making use of dedicated unit operations.
Even plastic packaging is a complex mixture of molecules, and each one plays a role: they provide the strength, color, texture, elasticity and durability we associate with performance.
At the STP outlets, a complex mixture of molecules, including incompletely eliminated waste water molecules but also metabolites formed during treatment processes, are finally discharged into rivers.
Bitumen is a complex mixture of heavy molecules including asphaltene which is the most polar and heaviest molecule and bears the most heteroatom and organometallic compounds (i.e., hybrid organic radicals that are attached to the metal atom).
A bioorthogonal reactive group could be added to a complex mixture of biological molecules in aqueous solution without reacting with any of them.
A series of studies have revealed a complex mixture of signaling molecules acting both within the stromal tissue and between the stromal and epithelial tissues.
Silymarin is a complex mixture of polyphenolic molecules, including seven closely related flavonolignans, i.e. silibin A, silibin B, isosilibin A, isosilibin B, silichristin, isosilichristin, silidianin and the flavonoid taxifolin, the most effective antioxidant of these molecules [1].
Snake venoms are characterized as a complex mixture of bioactive molecules, which proteins compose more than 90% of the venom dry weight [ 10– 10].
As a complex mixture of different molecules and compounds, the other chemical constituents of honey might also affect its absorbance, including minerals, peptides, amino acids and alkaloids which can produce major interference [ 28].
Shortly following hatching, C. elegans larvae assess crowding in their environment via concentrations of a complex mixture of small molecules called ascarosides (collectively referred to as dauer pheromone) produced by conspecifics (Golden and Riddle, 1982, 1984c; Jeong et al., 2005; Butcher et al., 2007; Edison, 2009; Ludewig and Schroeder, 2013).
Cell culture media include a very complex mixture of molecules (small molecules as well as complex molecules such as proteins and nucleic acids), extremely different in size and concentration.
