rank these amino acid from most polar to least: His, Phe, Ser, Ile, Asp, Trp
i don't think my answer is correct...
Ser>Asp>His>Phe>Trp>Ile
I think its correct. lle is the least because it has the longest non polar R group, Ser has an OH the strongest polar group, His has NH group but are attached in ring which makes them least polar, Trp has 2 aromatic rings and Phe has 1 aromatic ring.
To rank these amino acids from most polar to least polar, we need to consider their chemical properties and determine which ones are more likely to interact with water or polar solvents.
One way to assess the polarity of an amino acid is to look at the presence of charged or polar functional groups in its side chain. For example, amino acids with charged side chains, such as Asp (aspartic acid) and His (histidine), tend to be more polar.
Another approach is to look at the hydrophobicity of the amino acid side chain. Hydrophobic amino acids, such as Phe (phenylalanine), Trp (tryptophan), and Ile (isoleucine), are less polar because their side chains are mostly composed of hydrocarbon groups. On the other hand, Ser (serine) has a hydroxyl group in its side chain, which increases its polarity.
Based on these considerations, a corrected ranking of the amino acids from most polar to least polar would be:
Asp > His > Ser > Trp > Phe > Ile
Keep in mind that this ranking is not an exact science, as there are other factors that can influence the polarity of an amino acid. Additionally, experimental methods can also be used to determine the relative polarities of amino acids.