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Date: 4-12-2021
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Fatty Acid Structure
A fatty acid consists of a hydrophobic hydrocarbon chain with a terminal carboxyl group that has a pKa (see p. 6) of ~4.8 (Fig. 1). At physiologic pH, the terminal carboxyl group (–COOH) ionizes, becoming –COO−. [Note: When the pH is above the pK, the deprotonated form predominates .] This anionic group has an affinity for water, giving the fatty acid its amphipathic nature (having both a hydrophilic and a hydrophobic region). However, for longchain-length fatty acids (LCFA), the hydrophobic portion is predominant. These molecules are highly water insoluble and must be transported in the circulation in association with protein. More than 90% of the fatty acids found in plasma are in the form of fatty acid esters (primarily TAG, cholesteryl esters, and phospholipids) contained in circulating lipoprotein particles . FFA are transported in the circulation in association with albumin, the most abundant protein in serum.
Figure 1: Structure of a fatty acid.
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في اليوم العالمي للصحة النفسية.. نصائح لتحسين مزاجك اليومي
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آلاف الأشخاص يحاولون الهروب من فلوريدا بسبب إعصار ميلتون
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لليوم الثاني.. العتبة العباسية تواصل إقامة مجلسها العزائي بذكرى شهادة السيدة فاطمة الزهراء (عليها السلام)
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