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Are peptide bonds alpha

RAB rab at oci.utoronto.ca
Mon Mar 18 10:58:26 EST 1996

I think you borrowed the "alpha" nomenclature from saccharide bonds, 
those can be alpha or beta. 

An ordinary peptide bond 

              R1            O
														|             |
													 C      N      C.........
												/   \  /   \  /
     ......N      C      C
 																	|		 			|
	 																O					 R2

is called trans, because the side chains point in opposite directions
If they point in the same direction, the bond is cis (a few % of all 


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