Are there amino acids in oranges?
Orange juice
For Canadian markets, orange juice must be the fruit juice obtained from clean, sound, and mature oranges.[29] The juice must also contain a minimum of 1.20 milliequivalents of free amino acids per 100 millilitres, contain a minimum of 115 milligrams of potassium per 10 milliliters, and possess a minimum absorbance value for total polyphenolics of 0.380.[30] Sweeteners such as sugar, invert sugar, dextrose or glucose solids may be added. The orange juice must have a Brix reading of at least 9.7, excluding the sweetening ingredients, and contain between 0.5 and 1.8 percent of acid by weight calculated as anhydrous citric acid.[29] Added orange essences, orange oils and orange pulp adjusted in accordance with good manufacturing practice is permitted. Orange juice is also permitted to contain sugar, invert sugar, dextrose in dry form, glucose solids, a Class II preservative, amylase, cellulase and pectinase.[29]
Orange (fruit)
The orange is a hybrid between pomelo ("Citrus maxima") and mandarin ("Citrus reticulata"). The chloroplast genome, and therefore the maternal line, is that of pomelo. The sweet orange has had its full genome sequenced.