Sarcoplasmic Protein Solubility

Sarcoplasmic proteins (e.g., myoglobin) are soluble in:

Correct Answer: Both water and salt

Sarcoplasmic proteins (e.g., Myoglobin, glycolytic enzymes) are soluble in both water and salt solutions. They are low molecular weight, globular proteins.

Why Sarcoplasmic Proteins Are Both Water- and Salt-Soluble

Sarcoplasmic proteins are inherently hydrophilic (water-loving) with a globular structure. Their surface amino acids are predominantly polar/charged, making them readily soluble in water. Salt further enhances their solubility by ionic interactions.

Practical Implication

When meat is minced or ground, sarcoplasmic proteins (including myoglobin — the red pigment) leach out readily in the meat drip/exudate. This is why ground/minced meat turns grey/brown faster than intact muscle — surface myoglobin oxidizes to metmyoglobin more readily.