The phrase "acid ser" is not correct and does not make sense in written English.
Without context, it is unclear what you are trying to convey, and it appears to be a fragment or a typo.
Example: "The solution contained an acid ser that reacted with the base."
Alternatives: "acid solution" or "acidic substance".
The function of this polymorphism has not yet been determined; however, the substitution of a hydroxylic amino acid (Ser) for an acidic amino acid (Asn) may affect the activity of the enzyme [ 12].
The molecular geometry surrounding the most important catalytic amino acid, Ser 195, was significantly altered by the binding of LMWLs while heparin had no measurable effect on Ser 195.
One polar amino acid Ser substitutes the apolar amino acid Ile at position 8 in AcAp2, and one apolar acid Ile substitutes the polar amino acid Asn.
However, the fact that OGTs transfer GlcNAc from UDP-GlcNAc to the side chain hydroxyl group of an amino acid (Ser or Thr) rather than transferring glucose from UDP-Glc to the hydroxyl group of glucose as in HMW1C-like proteins may explain why the sequence identities between HMW1C-like enzymes and OGT-like enzymes are marginal.
A1082G polymorphism of the MMP12 gene results in a substitution of amino acid Ser for Asn in codon 357.
The analysis indicated a sparing of the amino acid Ser, probably for protein synthesis, by inhibition of its catabolic utilization.
The deviation of alcoholic and dicarboxylic groups containing amino acids (Ser, Asp, and Glu) from the Hammett correlations suggests that not only steric and inductive factors, but also other processes such as adsorption behavior of amino acids onto solid surface also contributed to mineralization of amino acids to oxidized species.
The atomic group –OH is the Hp-π donor in amino acids Ser, Thr, and Tyr.
On the other hand, 10 amino acids (Ser, Thr, Asn, Gln, Cys, Tyr, Trp, His, Lys, and Arg) possess various Hp-π donors.
For the affected amino acids SER, THR, and TYR, hydrogen bonds to neighbouring residues and the ligand are taken into account, providing a more realistic representation of the binding site.
In proteins the Hp-π interaction donors are the polar hydrogen atoms in atomic groups [12 16] –NH2, >NH, –OH, –SH, and C6H5OH, which exist in amino acids Ser, Thr, Tyr, Trp, Cys, His, Asn, Gln, Lys, and Arg, while the acceptors are the aromatic amino acids, Phe, Tyr, Trp, and His [19, 20].
