Male seminal protein which triggers short- and long-term post-mating behavioral responses (PMR) in female Drosophila. Binds initially to sperm where it is later cleaved to release an active peptide within the female reproductive tract. Signals via the sex peptide receptor (SPR) in female flies, may also act via other receptors. Moderates the activity of distinct neuronal circuitries in the female genital tract to promote specific PMRs including: enhanced ovulation, increased egg laying rate, increased feeding/foraging rate, induced antimicrobial peptide synthesis, reduced mating receptivity, reduced day-time sleep and reduced lifespan in multiple mated females. Recombinant protein corresponding to aa20-55 from Drosophila melanogaster Accessory gland-specific peptide 70A, expressed in Yeast. Molecular Weight: ~4.3kD Amino Acid Sequence: WEWPWNRKPTKFPIPSPNPRDKWCRLNLGPAWGGRC Storage and Stability: Lyophilized and reconstituted products are stable for 6 months after receipt at -20C. Reconstitute with sterile ddH2O. Aliquot to avoid repeated freezing and thawing. Store at -20C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer.
Supplied as a lyophilized powder from 20mM Tris-HCl, 0.5M sodium chloride, pH 8.0, 6% trehalose. Reconstitute with sterile ddH2O to a concentration of 0.1-1mg/ml.
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