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Absolute beta 2m densities were found to depend on disease category with the lowest levels found on cells from chronic lymphocytic leukaemia (mean = 5.6 ng\/10(6) cells, n = 27); atypical chronic lymphocytic leukaemia (mean = 5.9 ng\/10(6) cells, n = 8); and prolymphocytoid chronic lymphocytic leukaemia variant (mean = 6.0 ng\/10(6) cells, n = 16). beta 2m densities for B non-Hodgkin's lymphoma (n = 14) and B prolymphocytic leukaemia (n = 17) cases were 8.1 and 10.0 ng\/10(6) cells, respectively, and the highest densities were found on cells from \"late-B cell\" tumours (mean = 14.3 ng\/10(6) cells). Plasma cells from cases of Ig secreting tumours expressed unexpectedly low beta 2m densities (mean = 9.3 ng\/10(6) cells; n = 6).<\/jats:p>","DOI":"10.1136\/jcp.40.5.486","type":"journal-article","created":{"date-parts":[[2007,6,9]],"date-time":"2007-06-09T00:50:46Z","timestamp":1181350246000},"page":"486-489","source":"Crossref","is-referenced-by-count":8,"title":["Cell surface expression of beta 2-microglobulin (beta 2m) correlates with stages of differentiation in B cell tumours."],"prefix":"10.1136","volume":"40","author":[{"given":"R A","family":"Jones","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"C S","family":"Scott","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"D R","family":"Norfolk","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"A N","family":"Stark","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"J A","family":"Child","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[1987,5,1]]},"reference":[{"key":"ref_1","first-page":"35","article-title":"Highly purified papainsolubilised HL-A antigens","volume-title":"contain beta 2-microglobulin. 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