**1. Write the Fischer projection formula for the following amino acids as D and L by properly labeling them.** **a.** The structure depicted is an amino acid with the following groups attached to the central carbon (Cα):- An amino group (\( \text{H}_2\text{N} \))- A hydroxyl group (\( \text{OH} \))- A carboxyl group (\( \text{COOH} \)) with an additional methylene group (\( \text{CH}_2 \)) attached.**b.** The structure depicts another amino acid with:- An amino group (\( \text{H}_2\text{N} \))- A methyl group (\( \text{CH}_3 \))- A carboxyl group (\( \text{COOH} \))**c.** The structure shows an amino acid with:- An amino group (\( \text{H}_2\text{N} \))- A phenyl group (\( \text{C}_6\text{H}_5 \)) linked via a methylene bridge (\( \text{CH}_2 \))- A carboxyl group (\( \text{COOH} \))Each structure needs to be labeled according to whether it is in the D or L configuration. This is determined based on the position of the functional groups in the Fischer projection. ### Structures of Amino AcidsThe image displays the structural formulas of two amino acids, labeled as d and e.#### d. Threonine- **Chemical Structure**: - **Backbone**: Consists of an amino group (H₂N) attached to a central carbon (CH), which is connected to a carboxylic acid group (COOH). - **Side Chain**: The central carbon is also bonded to a CH₂ group, and this CH₂ is further bonded to an OH group, forming a –CH(OH)CH₃ configuration.#### e. Lysine- **Chemical Structure**: - **Backbone**: Similar to threonine, it has an amino group (H₂N) connected to a central carbon (CH), which links to a carboxylic acid group (COOH). - **Side Chain**: The central carbon is bonded to a longer carbon chain, consisting of four consecutive CH₂ groups, terminating with an NH₂ group. This structure can be represented as –CH₂–CH₂–CH₂–CH₂–NH₂.These diagrams provide a clear representation of the specific atomic connections in each amino acid, crucial for understanding their properties and roles in protein structure.

Hello. Since your question has multiple sub-parts, we will solve the first three sub-parts for you. If you want the remaining sub-parts to be solved, then please resubmit the whole question and specify those sub-parts you want us to solve.The D- and L- configuration is decided on the basis of the presence of the amine group, if it is on the left side and the hydrogen on the right side then it will be L, and if it is on the right side and hydrogen on the left side then it will be D.