Amino Acids-BIOCHEM 384

Descripción

Fichas sobre Amino Acids-BIOCHEM 384, creado por Anna S el 08/09/2017.
Anna S
Fichas por Anna S, actualizado hace más de 1 año
Anna S
Creado por Anna S hace más de 7 años
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Resumen del Recurso

Pregunta Respuesta
Charged amino acids Charged amino acids affected by pH
ASPARTATE -ASP D-pKa of 3.9 At pH 7: negative
GLUTAMATE-GLU-E-pka of 4.1 At pH 7:negative
LYSINE-LYS-K-pka of 10.5 At pH 7:negative
ARGININE-ARG-R-pka of 4.1 At pH 7:posttive
HISTIDINE-HIS-H- pka of 6.0 At pH 7:neutral
HYDROPHILIC AMINO ACIDS UNCHARGED AT pH 7
SERINE-SER-S Can form hydrogen bonds and maybe a substrate for kinase-mediated phosphorylation
THERONINE- THR-T-Hydroxyl group can form hydrogen bonds and maybe phosphorylated.
CYSTEINE- CYS-C-Can form a disulfide bond with other cyteines and can form weak hydrogen bonds.
ASPARGINE-ASN-N- can form numerous hydrogen bonds , similar charge to Aspartate.
GLUTAMINE GUL-Q- can form hydrogen bonds
Hydrophobic amino acids
GLYCINE- GLY-G-Smallest amino acid, chemically neutral of all amino acids
ALANINE-ALA-A Minimally hydrophobic
PROLINE-PRO-P cyclic ring limits conformation. limits hydrogen bonding
VALINE-VAL-V Small hyrophobic amino acids
LEUCINE-LEU-L abundant amino acid in protein
ISOLUCINE- ILE-Loften found in hydrophobic core of globular proteins
METHIONINE- MET-M -the sulfer in in Met is unreactive. Often the terminal amino acid in nascent polypeptides
Aromatic Amino Acids They absorb ultraviolet light around 250nm---280nm
PHENYLALANINE-PHE-F- hydrophobic, weak Uv light absorption.
TYROSINE-TYR-Y- Forms a hydrogen bonds making an amphipathic amino acid and hyrophilic properties. Absorbs λ at 280 nm.
TYRPTOPHAN- TRP_W-Largest amino acid. Strongly absorbs λ at 280nm.
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