Leucine (abbreviated as Leu or L) is a branched-chain α-amino acid with the chemical formula HO2CCH(NH2)CH2CH(CH3)2.
== Izbrana dela ==* "Educational Psychology" (1903)* "Introduction to the Theory of Mental and Social Measurements" (1904)* "The Elements of Psychology" (1905)* "Animal Intelligence" (1911)* "Education Psychology: briefer course" (1913/1999)* "The Teacher's Word Book" (1921)* "The Psychology of Arithmetic" (1922)* "The Measurement of Intelligence" (1927)* "A Teacher's Word Book of the Twenty Thousand Words Found Most Frequently and Widely in General Reading for Children and Young People" (1932)* "The Fundamentals of Learning" (1932)* "The Psychology of Wants, Interests, and Attitudes" (1935)* "The Teacher's Word Book of 30,000 Words" (skupaj z Irvingom Lorgeom) (1944)