A four chain unit is repeated in the higher molecular weight immunoglobulins; IgM generally exists as a pentamer of four basic units held together by disulfide bonds [url=http://buylasixon.com]lasix name[/url] HER 2 FISH was assessed in the Australian National Reference Laboratory Department of Pathology, St Vincent s Hospital, Sydney using the Vysis PathVysion HER 2 DNA dual colour probe kit