vasotocin

Buku et al. [ 16] synthesized two fluorescent probes for the vasotocin receptor using fluorescein and tetramethylrhodamine.

Arginine vasotocin, melanocyte stimulating hormone, and the nerve-blocker pindolol had no great effect on the resulting free-running (circadian) rhythms.

These investigators had previously conjugated the fluorophores to the seventh position of vasotocin, a nonapeptide, and found that it had biological activity, but that the biological activity was reduced when compared to the native compound [ 17].

Thus, they concluded that by moving the bulky fluorophore to the end of vasotocin, and not altering an amino acid involved in binding and activation of the vasotocin receptor minimized the reduction in biological activity of the probes.