How to attract sperm

Chemical signals play a crucial role in the communication between sperm and egg that facilitates fertilization, but the identity of the signaling molecules involved remains unclear. In May 15 Journal of Experimental Biology, Jeffrey Riffell and colleagues from University of California, Los Angeles, show that the amino acid L-tryptophan is necessary and sufficient to promote recruitment of sperm to the surface of eggs in red abalone (Haliotis rufescens).Riffell et al. investigated the behavioral

| 1 min read

Register for free to listen to this article
Listen with Speechify
0:00
1:00
Share

Chemical signals play a crucial role in the communication between sperm and egg that facilitates fertilization, but the identity of the signaling molecules involved remains unclear. In May 15 Journal of Experimental Biology, Jeffrey Riffell and colleagues from University of California, Los Angeles, show that the amino acid L-tryptophan is necessary and sufficient to promote recruitment of sperm to the surface of eggs in red abalone (Haliotis rufescens).

Riffell et al. investigated the behavioral responses of red abalone sperm to soluble factors released into seawater by conspecific eggs. They observed that sperm in proximity to individual live eggs swam significantly faster and oriented towards the egg surface. Bioassay-guided fractionation and chemical characterization by nuclear magnetic resonance spectroscopy indicated that the free amino acid L-tryptophan was the natural sperm attractant in H. rufescens (J Exp Biol 2002, 205:1439-1450).

"Elucidation of the sperm attractant for red abalone therefore provides a powerful new ...

Interested in reading more?

Become a Member of

The Scientist Logo
Receive full access to more than 35 years of archives, as well as TS Digest, digital editions of The Scientist, feature stories, and much more!
Already a member? Login Here

Meet the Author

  • Tudor Toma

    This person does not yet have a bio.
Share
Image of a woman in a microbiology lab whose hair is caught on fire from a Bunsen burner.
April 1, 2025, Issue 1

Bunsen Burners and Bad Hair Days

Lab safety rules dictate that one must tie back long hair. Rosemarie Hansen learned the hard way when an open flame turned her locks into a lesson.

View this Issue
Conceptual image of biochemical laboratory sample preparation showing glassware and chemical formulas in the foreground and a scientist holding a pipette in the background.

Taking the Guesswork Out of Quality Control Standards

sartorius logo
An illustration of PFAS bubbles in front of a blue sky with clouds.

PFAS: The Forever Chemicals

sartorius logo
Unlocking the Unattainable in Gene Construction

Unlocking the Unattainable in Gene Construction

dna-script-primarylogo-digital
Concept illustration of acoustic waves and ripples.

Comparing Analytical Solutions for High-Throughput Drug Discovery

sciex

Products

Green Cooling

Thermo Scientific™ Centrifuges with GreenCool Technology

Thermo Fisher Logo
Singleron Avatar

Singleron Biotechnologies and Hamilton Bonaduz AG Announce the Launch of Tensor to Advance Single Cell Sequencing Automation

Zymo Research Logo

Zymo Research Launches Research Grant to Empower Mapping the RNome

Magid Haddouchi, PhD, CCO

Cytosurge Appoints Magid Haddouchi as Chief Commercial Officer