L-Tryptophane is an amino acid that is made from plant or animal resources

tryptophanase

Yes about 8-10% of protein fond in maize depending on their variety.Maize protein doesn't contain lysine and tryptophane. Other than that maize is rich in carbohydrates (75%) and a little amount of fats (5%).

Albert Carl Groschke has written:

'Relation of corn and tryptophane-low proteins to the dietary requirements for nicotinic acid in chickens' -- subject(s): Poultry, Nutrition, Nicotinic acid, Feeding and feeding stuffs

Hydrophilic ("water loving") amino acid side chains are either charged or polar. Both are attracted by water molecules. Histidine, Lysine, Glutamate, Aspartate, Arginine

Hydrophobic: Alanine, Isoleucine, Leucine, Phenylalanine, Valine, Proline, Glycine, Methionine, Phenylalanine, Tryptophane, Cysteine.

Less Hydrophobic: Tyrosine, Histidine, Serine, Threonine, Proline, Glycine, Alanine, Glutamine