the pteridine biosynthesis was higher in the retina ( neopterin 422 +/- 27 , 260 +/- 24 ; sepiapterin 135 +/- 12 , 118 +/- 14 ; biopterin 76 +/- 10 , 68 +/- 8 nanomoles/g soluble protein/hr , in rat and human , respectively ) than in the ciliary body-iris and lens .
C0068527
neopterin
C0005562
biopterin