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“Furthermore, the amino acids arginine, cysteine , and histidine also inhibited the uptake of ALA , and even more so MAL, suggestive of an additional involvement of amino acid transporters.”
Naunyn-Schmiedeberg's Archives of Pharmacology • 2012 | View Paper
“As compared to FeC activity in cells treated with ALA and irradiation, enzyme activity was higher (by 31.9%‐62.1%) in the presence of LC (1.0 mM or 5.0 mM) and in the presence of NAC (1.0 mM or 5.0 mM).”
Photodermatology, photoimmunology & photomedicine • 1996 | View Paper
“The amino acids L-cysteine , L-serine, L-arginine, L-proline and L-alanine were found to inhibit the synthesis of 6-aminolevulinic acid (TABLE 1); Laspartate, L-asparagine, L-glutamate, L-threonine, and D , L-valine were not inhibitory.”