Atomic force microscope observation of athletes' hemoglobin imaging.

Area of Science:

• Biophysics
• Materials Science
• Analytical Chemistry

Background:

• Hemoglobin (Hb) is a tetrameric protein crucial for oxygen transport, featuring heme groups with iron atoms.
• Understanding Hb's dynamic structure and interactions is vital for assessing physiological function, particularly in athletes.

Purpose of the Study:

• To image hemoglobin (Hb) using Atomic Force Microscopy (AFM).
• To measure the physical function of athletes by analyzing Hb.
• To investigate the influence of environmental factors on Hb's absorption spectrum and morphology.

Main Methods:

• Hemoglobin crosslinking with glutaraldehyde to determine morphology and size.
• Atomic Force Microscopy (AFM) for imaging cross-linked Hb samples.
• Analysis of Hb absorption spectra under varying pH, temperature, oxygen partial pressure, and osmotic pressure.

Main Results:

• Uncrosslinked Hb size was 6.64 nm; crosslinking increased molecular size, with some aggregates reaching 80-100 nm.
• Changes in pH, temperature (30-55°C), and oxygen levels altered Hb's absorption spectrum peaks (e.g., at 550, 589, and 610 nm).
• Deoxygenation and increased osmotic pressure led to decreased oxygen-binding capacity and Hb concentration changes.

Conclusions:

• AFM provides accurate and comprehensive imaging of athlete hemoglobin.
• Environmental factors significantly impact Hb structure and spectral properties.
• AFM is a valuable tool for assessing Hb-related physiological functions in athletes.