Amino acid composition of the different morphological components of hair

Range Table - link µmoles/gram dry hair
Organism Human Homo sapiens
Reference Robbins, Clarence R. Chemical composition, pp.39-68, chapter 2 in the book Chemical and physical behavior of human hair / Clarence R. Robbins.-2nd ed (2002) p.51 table 2-6
Primary Source See refs beneath table
Method See notes beneath table
Comments P.50 4th paragraph: "Bradbury et al. [primary source 16] have suggested that the cuticle of human hair contains more cystine, cysteic acid, proline, serine, threonine, isoleucine, methionine, leucine, tyrosine, phenylalanine, and arginine than does whole fiber. Data calculated from Bradbury's results and those of Robbins [primary source 12] on whole human hair fibers are summarized in Table 2-6. Lustig et al. [ref 66] have described comparative cuticle and cuticle-free hair analyses of certain amino acids in human hair, and their data are qualitatively similar to those of Bradbury. In addition, these authors suggest less tryptophan and histidine in cuticle than in whole fiber." P.52 2nd paragraph: "Since the cortex comprises the major part of the fiber mass, results of whole-fiber analysis may be considered to be a good approximation of the composition of the cortex (see Table 2-6). Obviously, the largest errors resulting from this approximation will be in those amino acids occurring in smaller quantities in the cortex."
Entered by Uri M
ID 116951