Mayo Test Catalog, (Sorted By Test Name) - Mayo Medical ...

AACSF
81934
Argininosuccinic Acid Asa
Carnosine Car 27-1021 16-616 18-319
Anserine Ans
Homocitrulline Hcit 11-158
Arginine Arg 10-560 20-395 14-240
Alpha-aminoadipic Acid Aad 10-275 15-324 10-135
Gamma Amino-n-butyric
Acid
Beta-aminoisobutyric
Acid
Alpha-amino-n-butyric
Acid
GABA
bAib 18-3137 15-1039 24-511 11-286
Abu
Hydroxylysine Hyl
Proline Pro 28-2029
Ornithine Orn
Cystathionine Cth
Cystine Cys 12-504 11-133 10-98
Lysine Lys 19-1988 25-743 14-307 17-276 10-240 15-271
Methionine Met
Valine Val 11-211 11-211 16-91 11-61
Tyrosine Tyr 39-685 38-479 23-254 22-245 12-208 15-115
Isoleucine Ile
Leucine Leu 15-167 12-100 13-73
Phenylalanine Phe 14-280 34-254 20-150 21-106 11-111 13-70
Tryptophan Trp 14-315 14-315 10-303 10-303 15-229 18-114
Allo-isoleucine AlloIle
Clinical References: Amino acids. In The Metabolic and Molecular Bases of Inherited Disease.
Eighth edition. Edited by CR Scriver, AL Beaudet, WS Sly, et al: New York, McGraw-Hill, 2001, pp
1667-2105
Amino Acids, Quantitative, Spinal Fluid
Clinical Information: Many genetic errors affecting amino acid metabolism have been identified.
Defects of either transport or catalytic activity of enzymes involved in this pathway result in
accumulation or excessive loss of 1 or more amino acids in biological fluids. Inborn errors of amino
acid metabolism can manifest themselves at anytime in a personâ€s life, but most become evident in
infancy and early childhood. Affected patients may have failure to thrive, neurological symptoms,
digestive problems, locomotor retardation, and a wide spectrum of laboratory findings. If not diagnosed
promptly and treated properly, these disorders can result in poor growth, mental retardation, and death.
Cerebrospinal fluid (CSF) specimens are highly informative for a subset of these conditions, such as
nonketotic hyperglycinemia and serine biosynthesis defects. CSF specimens are most informative when
a plasma specimen is drawn at the same time and the ratio of the amino acid concentrations in CSF to
plasma is calculated.
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