Tryptophan molfidget with rotatable bonds

20 Amino Acid Molfidgets Collectionhttps://makerworld.com/collections/8398687 This is a molecular model of Tryptophan, created using molfidget. Tryptophan is an essential amino acid, meaning it must come from the diet. It is a precursor to several important molecules, including serotonin (a neurotransmitter that regulates mood and sleep), melatonin (which controls the sleep–wake cycle), and niacin (vitamin B3). Tryptophan plays a role in mood balance, sleep regulation, and immune function. In this model, all single bonds are rotatable. Some carbon atoms are pre-connected, and you can complete the assembly by manually attaching the remaining atoms.