markers commonly used for the identification of b lymphocytes ( surface immunoglobulins ) and t lymphocytes ( receptors for sheep red blood cells ) were unreliable for the analysis of colostral cells ( unless accompanied by subsequent morphological characterization ) because strong fluorescence was observed on the surface of many non-lymphoid cells and because numerous macrophages and colostral corpuscles formed rosettes with sheep red blood cells ( srbc ) .
C0039194
t lymphocytes
C0108773
receptors