10 11 Serum free light chain aSSayS The serum free light chain assays are capable of detecting free light chains at their normal (non-elevated) levels in the blood. Importantly, these assays can detect mildly increased lev-els of free light chains even when these levels are undetectable by SPEP and IFE.here are two types of light chains, and they are referred to as kappa (Îº) and lambda (Î» or L). Each plasma cell produces only one type of heavy chain and one type of light chain. Altogether, there are 10 subtypes of normal immunoglobulins (see Table 1). Table 1. Subtypes of Immunoglobulins.
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Member Countries. The Organization of the Petroleum Exporting Countries (OPEC) was founded in Baghdad, Iraq, with the signing of an agreement in September 1960 by five countries namely Islamic Republic of Iran, Iraq, Kuwait, Saudi Arabia and Venezuela. They were to become the Founder Members of the Organization.These countries were later joined by Qatar (1961), Indonesia (1962), Libya (1962), the United Arab Emirates (1967), Algeria (1969), Nigeria (1971), Ecuador (1973), Gabon (1975) and Angola (2007).From December 1992 until October 2007, Ecuador suspended its membership. Gabon terminated its membership in 1995.hese countries were later joined by Qatar (1961), Indonesia (1962), Libya (1962), the United Arab Emirates (1967), Algeria (1969), Nigeria (1971), Ecuador (1973), Gabon (1975) and Angola (2007). From December 1992 until October 2007, Ecuador suspended its membership. Gabon terminated its membership in 1995.