Cont... 3+3+2+2 rule

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Now this is the time to learn another 10 amino acids.


THIS TIME ONLY BY CHANGING 'R' WE GET ALL OTHER AMINO ACIDS.

So lets start:

AROMATIC 

REMEMBER ; All aromatic amino acid's name starts with sounds "ty" except phenylalanine which has itself a word "phenyl" which indicates aromatc amino acid.

1. PHENYLALANINE :- It is a phenyl derivative of ALANINE.  It has R =  -CH2C6H5




2. TYROSINE               :- It is a phenol derivative of ALANINE it has R = -CH2C6H4OH


3. TRYPTOPHANE      :- It is a indole derivative of Glycine. It has R as Indole group
   


BASIC

REMEMBER ; All basic amino acids have 3 carbon as side chain except LYSINE whose name suggest that he is LIER ( LYSINE has 4 carbon as side chain).

1. HISTIDINE :- It has R = imidazole ring as a side chain.



2. LYSINE       :- As mentioned above that this molecule is a lier. It has R = n-butylamine.




3. ARGININE  :- This has R = 3 carbon straight chain + guanidino group .




ALIPHATIC HYDROXYL

REMEMBER ; This also has only two, one is SERINE and other is THRIONINE

1. SERINE         :- It is a derivative of alanine.It has R = -CH2OH


2. THRIONINE :- It is also a derivative of alanine. This molecule's name suggest that it has 3 groups(thrio means three) ,-H ,-OH                                       ,-CH3 to a carbon which is attached as R.




SULPHUR CONTAINING

REMEMBER ; This also has only two, one is CYSTEINE and other is METHIONINE

1. CYSTEINE       :-  It is a derivative of alanine. It has R = -CH2SH


2. METHIONINE :- It is also a derivative of alanine. As in above (thrionine) it's name suggest that it has 'methyl' = 'METH' and 'thio ether' = 'THIO'. It has R = -CH2CH2SCH3.




Finally for further explaination of these tricks to remember 20 amino acids you can access my handmade notes by clicking the following link.



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