Biochemistry The protein defective in cystinosis is responsible for A Absorption of cysteine from intestine B Absorption of cysteine from renal tubules C Efflux cysteine from endoplasmic reticulum D Efflux of cysteine from lysosome 💡 Explanation The protein defective in cystinosis is responsible for ✓ Correct Answer: D. Efflux of cysteine from lysosome