糖蛋白

• 米(grain; seed)RADICAL
• 唐(large; empty (homophone of sugar))PHONO-SEMANTIC

Sugar is a sweet substance extracted from grain, with sound based on Tang.

• 疋(foot; leg (sound similar to 'đản'))PHONETIC
• 虫(insect; reptile)RADICAL

An egg is what reptiles lay, with a round shape like a foot.

• 白(white; light; bright)ASSOCIATIVE

The sun radiating bright rays suggests the pristine white color.