CH oxidation of aldehyde Retinoic acid Hormonal to acid (d) sign thelial CH. CH CH. CH3 CHs CHs CH CH visible CH ight CHa -CH Neuronal point of OXI ono sIgna cleavage 11 alcohol to 11 Dehyde 11 to brain CHs CH3 H Vitamin A1 11-cis-Retinal (retinol) (visual pigment all-trans-Retinal CH (b) (e) CH B-Carotenc
Function: wm keep epithelial tissue healthy. 米 Maintaining orthosia(正常视觉) Deficiency diseases night-blindness夜盲症 Source β- carotinβ—胡萝卜素(7.7mg/100g)
Function: keep epithelial tissue healthy. Maintaining orthopsia(正常视觉). Source: β – carotin β—胡萝卜素 (7.7mg/100g) Deficiency diseases: night-blindness 夜盲症
∏. Vitamin d R HO 麦角固醇 维生素D2 7-脱氢胆固醇 维生素D3 22-双氢麦角固醇 维生素D4 7-脱氢谷固醇 维生素D5 Among them, 1, 25-dihydroxycholecalciferol is the biological most active
Ⅱ．Vitamin D HO R 麦角固醇 7-脱氢胆固醇 22-双氢麦角固醇 7-脱氢谷固醇 维生素D2 维生素D3 维生素D4 维生素D5 Among them, 1,25-dihydroxycholecalciferol is the biological most active
HaC CH3 HoC CH3 HO 3 7-Deh UV light 2 steps (in skin) Ha CHa HC CH. Cholecalciferol (vitamin D3) HO 1 step in the liver 1 step in the kidney H3C CH3 Hoc CH2 1, 25-Dihydroxycholecalciferol 题 (1, 25-dihydroxyvitamin D3)
Function Promote absorbing of calcium and phosphonium into intestine, adjust calcium and phosphorus metabolism, be helpful of ossature(骨骼) calcifying and tooth forming Deficiency deseases actitis(偻病) osteomalacia(软骨病) 「A Source fish-liver o,yok蛋黄,mik
Function: Promote absorbing of calcium and phosphonium into intestine, adjust calcium and phosphorus metabolism, be helpful of ossature(骨骼)calcifying and tooth forming. Deficiency deseases: rachitis(佝偻病 )osteomalacia(软骨病) Source: fish-liver oil，yolk蛋黄，milk