Talk:Peptide
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[edit] Peptides vs. Proteins:
Q: What is the difference between a peptide and a protein? :S Brutulf 16:34, Apr 4, 2005 (UTC)
A: Peptides are less than 50 amino acids long and they do not have secondary and tertiary structures. Therefore they can fold into a variety of shapes. e.g. Insulin. Proteins, however, have more than 50 amino acids. They have secondary and tertiary structures, and therefore most proteins have fixed shapes. e.g. Hemoglobin.
- See Also: Grand Peptide List The Biochemical Basis of Neuropharmacology Oxford Press 1996--McDogm 16:42, 6 May 2005 (UTC)
Q: I disagree - my teacher says that peptides are simply chains of proteins.
A: Peptides and proteins are both chains of amino acids. However proteins are longer chains. This is probably what your teacher was referring to. Archie 11:46, 8 April 2006 (UTC)
Q: I'm doing a PhD thesis on membrane-peptide interactions. I believe the following is not true (cited from wikipedia article): Because of the arbitrary nature of this definition, there is considerable movement within the scientific community to ascribe the more-specific definition that "a peptide is an amino acid molecule without secondary structure; on gaining defined structure, it is a protein." Suggestion: delete it.
