Immuno-cytochemistry of cells from BM. (A) Cells from band 2 (mainly myelocytes, and metamyelocytes, and some band cells). (B) Cells from band 1 (mainly band cells and segmented cells). Cytospin preparations were immuno-reacted with anti-hCAP-18 antibody. hCAP-18 starts to appear in metamyelocytes and is prominent in all more mature cells (band cells and segmented cells).