2007-02-19 02:44:06 · 3 answers · asked by MisterMeToo 1 in Science & Mathematics ➔ Biology
A peptide is a shorter molecule formed from the linking, of α-amino acids while proteins are composed of polypetides; hence, it is longer. A peptide can be composed of less than 50 amino acids, while a protein hormone is composed of more than 50 amino acid.
2007-02-19 02:55:58 · answer #1 · answered by ? 7 · 1⤊ 1⤋
Not certain, but they're both technically peptide hormones = protein molecules that act as hormones. Insulin is fairly short as proteins go, and is active when unbound to other insulin proteins, so "peptide" suits it better than TSH, which has quaternary structure in the active form (two different subunits or peptides, make up the active protein)
2016-03-29 02:44:49 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Size. Peptides are really short compared to proteins.
2007-02-19 02:50:18 · answer #3 · answered by hrm_i_am_focking_bored 2 · 1⤊ 0⤋