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Date: 2-5-2016
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Date: 31-5-2021
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Date: 7-5-2021
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Beta-Strand
A b-strand is one of the two regular types of secondary structure (the other being the a-helix) that is commonly observed in protein structures. The b-strand is characterized by an extended backbone conformation. The b-strand is not stable as a discrete structural unit by itself, but is stable only when it associates through hydrogen bond interactions with adjacent b-strands to form a b-sheet.
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ما أبرز التغيرات التي تحدث عند الرجال عندما يصبحون آباءً؟
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حقائق مثيرة للاهتمام حول الأرض
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المجمع العلمي يحتفي بذكرى عيد الغدير في بغداد
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