The expression of VIP exists on photoreceptor- outer segment, inner nuclear layer and inner plexiform layer of retina and choroids, and weak expression exists on ganglion cell and nerve fiber layer.

VIP表达主要位于视网膜光感受器外节、内核层、内网状层和脉络膜，神经节细胞层和神经纤维层也有弱表达；

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In the retina of RCS rats, GABA-like immunoreactivity was observed in the inner plexiform layer, few GABA-ergic amacrine cells and the ganglion cell layer.

RCS鼠则分布于视网膜内丛状层的少量神经纤维、极少量GABA阳性免疫反应的无长突细胞和节细胞层的部分纤维。

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