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Spermatogenesis

Spermatogenesis

Spermatogenesis is the process by which haploid sperm cells are produced in the male testes. It starts with stem cells located close to the outer rim of seminiferous tubules. These spermatogonial stem cells divide asymmetrically to give rise to additional stem cells (meaning that these structures “self-renew”), as well as sperm progenitors, called spermatocytes. Importantly, this method of asymmetric mitotic division maintains a population of spermatogonial stem cells in the male reproductive...

Spermatogenesis

Spermatogenesis

Spermatogenesis is a complex process that involves the development of sperm cells from undifferentiated stem cells in the seminiferous tubules of the testes. The process is essential for the production of mature and functional sperm cells that are capable of fertilizing an egg.
The process of spermatogenesis can be divided into mitosis, meiosis, and spermiogenesis. During mitosis, the spermatogonia or stem cells divide to produce two identical daughter cells, type A and B spermatogonia. Type-A...

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Related Experiment Video

Updated: Jul 23, 2026

Cytological Analysis of Spermatogenesis: Live and Fixed Preparations of Drosophila Testes

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Rat spermatogenic cell beta-D-galactosidase: characterization, biosynthesis, and immunolocalization.

M D Skudlarek¹, A Abou-Haila, D R Tulsiani

¹Department of Obstetrics & Gynecology, Department of Cell Biology, Vanderbilt University School of Medicine, Room D-3243 MCN, Nashville, Tennessee 37232-2633, USA.

Experimental Cell Research

|November 18, 2000

Summary

Rat sperm acrosomal beta-d-galactosidase is crucial for zona pellucida penetration. This enzyme is expressed in spermatocytes and spermatids, with distinct molecular forms and processing during spermatogenesis.

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Last Updated: Jul 23, 2026

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Published on: January 20, 2014

Tracing Gene Expression Through Detection of β-galactosidase Activity in Whole Mouse Embryos

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Published on: June 26, 2018

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Published on: August 27, 2020

Area of Science:

Reproductive Biology
Cell Biology
Biochemistry

Background:

Sperm acrosomal beta-d-galactosidase plays a role in mammalian egg penetration.
Understanding its expression and function is key to reproductive processes.

Purpose of the Study:

To investigate the expression patterns and molecular forms of rat sperm acrosomal beta-d-galactosidase during spermatogenesis.
To elucidate the enzyme's synthesis, processing, and localization in germ cells.

Main Methods:

Biochemical, biosynthetic, and immunohistochemical analyses were employed.
Purification of germ cells (spermatocytes, round and elongated spermatids) from rat testis.
Enzyme activity assays, immunoblotting, and cell culture studies were performed.

Main Results:

Beta-d-galactosidase and other glycohydrolases were detected in rat spermatocytes and spermatids.
Enzyme activity per cell was higher in spermatocytes than round spermatids.
Distinct molecular forms (90/88 kDa precursors, 64/62 kDa mature forms) were identified, with cell-specific processing and localization in the Golgi and acrosome.

Conclusions:

Rat sperm acrosomal beta-d-galactosidase is synthesized and processed in a cell-specific manner during spermatogenesis.
The enzyme is localized to the Golgi apparatus and acrosome, supporting its role in zona pellucida penetration.