Assertion: centromere's repeat | /r/CapableOf | observe within the alpha-satellite blocks
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Source sentences:
text: Each L1 (LINE) repeat observed within proximal Xp and the alpha-satellite blocks is indicated as an oval, classified according to its subfamily [the currently active, human-specific elements (L1Hs) are shown at the top, with progressively older subfamilies listed below]. L1P subfamilies are primate-specific, whereas the L1M subfamily is quite large and composed of elements found throughout the mammalian radiation.