Main Article Content

Abstract

Amino acids are the building blocks of all peptides and proteins, which determine many of their important physiological properties. Amino acids help break down food, grow and repair body tissue, make hormones, provide energy, maintain healthy skin, hair, and nails, build muscle, and boost your immune system. In nature, there are over 500 distinct amino acids, however only 20 of them are involved in protein synthesis. Identifying the amino acid sequence of a protein or peptide provides useful information for understanding its structure and physiological functions. In this review article, different chemical methods such as Edman and Sanger degradation, as well as different chemical reagents such as ninhydrin, carboxypeptidase, and hydrazine, to identify the composition and sequence of amino acids in protein molecules, have been reviewed.

Keywords

Amino Acid Peptide Protein Amino Acids Sequence Physiological Functions

Article Details

Author Biography

Mohammad Tahir Aminzai, Department of Organic Chemistry, Faculty of Chemistry, Kabul University, Kabul, Afghanistan

روغن خام نباتی که از طریق فشار میخانیکی یا استخراج با محلل به دست می‌آید، شامل انواع ناخالصی‌های است که به طور طبیعی در دانه‌های روغنی موجود می‌باشند. روغن‌های خام نباتی تقریباً از ۹۸ درصد ترای گلیسراید و سایر مرکبات مانند پروتین‌ها، ویتامین‌ها، اسیدهای شحمی آزاد، صمغ‌ها، رزین‌ها، الدیهاید‌ها، کیتون‌ها، فاسفیت‌ها و غیره به نسبت جزئی تشکیل شده اند. به غیر از روغن‌ زیتون، متباقی روغن‌های خام مانند روغن‌های سویا، جواری، گل آفتاب‌پرست وغیره را نمی‌توان بدون انجام پروسه‌های تصفیه‌سازی مستقیماً مصرف کرد. هدف از تصفیه روغن، به دست آوردن کیفیت بهتر، بی‌بو، رنگ روشن‌تر، پایداری طولانی‌تر و صحی ساختن آن می‌باشد. در این مقاله مروری تصفیه فزیکی و کیمیاوی روغن خام نباتی مورد بحث قرار گرفته و در نتیجه فواید و نواقص هر دو میتود به تفصیل توضیح داده شده است.

 

How to Cite
Aminzai, M. T. (2025). Structure and Sequence Determination of Amino Acids in Protein Molecules. Journal of Natural Sciences – Kabul University, 6(1), 115–128. https://doi.org/10.62810/jns.v6i1.317

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