Medical term:
preprotein
preprotein
[pre-pro´tēn]a protein precursor that contains a signal peptide sequence; it is a nonpolar sequence at the head of the growing polypeptide chain and is required for its transfer into the cistern of the endoplasmic reticulum; the signal sequence is then cleaved to form the protein or proprotein.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
pre·pro·tein
(prē-prō'tēn),A secretory protein with a signal peptide region attached.
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