He heterodimer ʻo Cal, i haku ʻia me MRP 8 a me MRP 14. Aia ia i loko o ka cytoplasm neutrophils a hōʻike ʻia ma nā membrane cell mononuclear. He mau protein phase acute ʻo Cal, he pae paʻa maikaʻi kona ma kahi o hoʻokahi pule i loko o nā feces kanaka, ua hoʻoholo ʻia he hōʻailona maʻi ʻōpū mumū. ʻO ka kit kahi hoʻāʻo semiqualitative maʻalahi, ʻike maka e ʻike ana i ka cal i loko o nā feces kanaka, loaʻa iā ia ka ʻike kiʻekiʻe a me ka specificity ikaika. ʻO ka hoʻāʻo e pili ana i ke kumu hana sandwich antibodies pālua kiʻekiʻe a me nā ʻenehana loiloi immunochromatographic gula, hiki iā ia ke hāʻawi i kahi hopena i loko o 15 mau minuke.