10265808
| Question | Answer |
| 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 | |
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Image:
Lysine (binary/octet-stream)
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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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