also: リンタンパクしつ
noun
phosphoprotein
A protein that contains phosphate groups; a technical term in biochemistry.
カゼインは燐蛋白質の一種です。
Casein is a type of phosphoprotein.
Mixed kanji-katakana spelling; the katakana portion reflects the loanword origin of 'protein'.
蛋白質 is the general term for 'protein', while 燐蛋白質 specifically refers to a protein with phosphate groups attached.
Compound of 燐 (りん, 'phosphorus') and 蛋白質 (たんぱくしつ, 'protein'). The term is a direct calque from English 'phosphoprotein'.