He heterodimer ka Cal, i haku ʻia me MRP 8 a me MRP 14. Aia i loko o ka neutrophils cytoplasm a hōʻike ʻia ma nā membrane cell mononuclear.ʻO Cal he mau proteins acute phase, loaʻa iā ia kahi pae paʻa ma kahi o hoʻokahi pule i loko o nā faeces kanaka, ua hoʻoholo ʻia e lilo i mea hōʻailona maʻi ʻōpū.He ho'āʻo semiqualitative maʻalahi ke kit e ʻike ana i ka cal i loko o nā faeces kanaka, he kiʻekiʻe ka ʻike maka a me ka kikoʻī ikaika.ʻO ka hoʻāʻo e pili ana i ke ʻano kiʻekiʻe kikoʻī ʻelua antibodies sandwich reaction principle a me ke gula immunochromatographic assay analysis technics, hiki iā ia ke hāʻawi i kahi hopena i loko o 15 mau minuke.