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“Further our current molecular modeling studies indicate that the spatial arrangement and critical noncovalent interactions of tyrosine 42 and histidine 45 (aromatic residues unique to the α-subunit) make significant contribution to the Soret spectra.”
“The treatment with 1.0 and 1.5 g/kg but not 0.5 g/kg of L-histidine significantly decreased the brain levels of tyrosine , phenylalanine and some other amino acids 1 hr later.”
Japanese journal of pharmacology • 1989 | View Paper
“Infusion of methionine, tyrosine , phenylalanine, histidine and tryptophan (designated group 1) resulted in significant increases in the uptakes of tyrosine, phenylalanine and histidine.”
“The conjugated planar rings of tyrosine and tryptophan may interact with histidine within the active site to provide stability upon enzyme-peptide binding.”
“Results indicated that only amino acids of tryptophan, cysteine and histidine are photoactive and possess potential interferences in analysis of Tyr.”
“The proton movement occurs at both room temperature and ultra low temperature and is sensitive to the pH. Essentially it has been found that when the pH is below the pK(a) for respective histidine the function of the tyrosine is slowed down or, at ultra low temperature, halted.”
“Substitution of this histidine with tyrosine , another permissive residue at this position for naturally occurring sequences, increases not only the pH stability of HP67 but also the thermal stability and the cooperativity of thermal unfolding over a wide pH range (0.9-7.5).”
“The tyrosine can be oxidized by ultraviolet photolysis or electrochemical methods and has a potential cross-strand interaction with a histidine residue.”
Journal of the American Chemical Society • 2007 | View Paper
“Exchange of tyrosine to phenylalanine, tryptophan or histidine led to phenotypes with wild-type-like fidelity but enhanced PCR performance that could be related to a higher velocity of polymerisation.”