![Except for cysteine, only S amino acids occur in proteins. Several R amino acids are also found in nature, however. (R)-Serine is found in earthworms, and (R)-alanine is found in insect larvae. Except for cysteine, only S amino acids occur in proteins. Several R amino acids are also found in nature, however. (R)-Serine is found in earthworms, and (R)-alanine is found in insect larvae.](https://homework.study.com/cimages/multimages/16/r-serine658222037926285646.gif)
Except for cysteine, only S amino acids occur in proteins. Several R amino acids are also found in nature, however. (R)-Serine is found in earthworms, and (R)-alanine is found in insect larvae.
![SOLVED: 15. Draw the Fischer projections representing the D and L forms of the following: a) Phenylalanine b) Serine c) Valine 16. Draw the Fischer projections representing the L forms of the SOLVED: 15. Draw the Fischer projections representing the D and L forms of the following: a) Phenylalanine b) Serine c) Valine 16. Draw the Fischer projections representing the L forms of the](https://cdn.numerade.com/ask_previews/13da0a4d-8a4d-422e-9f66-87775bcdbe19_large.jpg)
SOLVED: 15. Draw the Fischer projections representing the D and L forms of the following: a) Phenylalanine b) Serine c) Valine 16. Draw the Fischer projections representing the L forms of the
![Fischer projection formulae for reference glyceraldehydes (A) and amino... | Download Scientific Diagram Fischer projection formulae for reference glyceraldehydes (A) and amino... | Download Scientific Diagram](https://www.researchgate.net/publication/333422513/figure/fig1/AS:763514973069313@1559047563495/Fischer-projection-formulae-for-reference-glyceraldehydes-A-and-amino-acids-B_Q320.jpg)
Fischer projection formulae for reference glyceraldehydes (A) and amino... | Download Scientific Diagram
![OneClass: Draw Fischer's projection for the following aminoacids: (a) L-cysteine (b) D-Cysteine (c) D... OneClass: Draw Fischer's projection for the following aminoacids: (a) L-cysteine (b) D-Cysteine (c) D...](https://prealliance-textbook-qa.oneclass.com/qa_images/homework_help/question/qa_images/109/10904755.png)
OneClass: Draw Fischer's projection for the following aminoacids: (a) L-cysteine (b) D-Cysteine (c) D...
![Except for cysteine, only S amino acids occur in proteins. Several R amino acids are also found in nature, however. (R)-Serine is found in earthworms, and (R)-alanine is found in insect larvae. Except for cysteine, only S amino acids occur in proteins. Several R amino acids are also found in nature, however. (R)-Serine is found in earthworms, and (R)-alanine is found in insect larvae.](https://homework.study.com/cimages/multimages/16/amino_acids6386998126564464923.gif)