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In vivo optical imaging of colivelin (CLN) labeled with Alexa680 (CLN-Alexa680). Pregnant female mice (E14) were i.p. administered with saline or saline containing 7 nmol of CLN-Alexa680. Thirty minutes after the injection, mice were optically imaged with Optix MX2 (A). The uterus was then dissected from the mice and imaged (B). The embryos were further dissected from the uterus and imaged (C). H, head; T, tail.
