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Certain short peptides, which are able to translocate across cell membranes with a low lytic activity, can be useful as carriers (vectors) for hydrophilic molecules. We have studied three such cell penetrating peptides: pAntp ('penetratin'), pIsl and transportan. pAntp and pIsl originate from the third helix of homeodomain proteins (Antennapedia and Isl-1, respectively). Transportan is a synthetic...
Circular dichroism spectroscopy has been used to study how different solvents stabilize secondary structure in the neuropeptide galanin (rat), two N-terminal fragments of galanin, galanin(1-12) and galanin(1-16), and six other differently charged analogs. Among these analogs, the peptide M40, galanin(1-13)-Pro-Pro-Ala-Leu-Ala-Leu-Ala amide, is a high affinity, receptor subtype specific galanin receptor...
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