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A simple protein insoluble in pure water, but soluble in a 0.5 to 1 per cent. solution of a neutral salt, and coagulable by heat; varieties of g. are present in blood, milk, and muscle.

Proteid of crystalline lens; albuminoid of blood corpuscles.

A proteid such as fibrinogen, vitellin.

The colourless substance that remains after the abstraction of the colouring matter of the blood-corpuscle. It is a peculiar albuminous principle. The globulin of Berzelius consists of the envelopes of the blood globules, and of the part of their contents that remains after the extraction of the haematin. Lecanu regards it as identical with albumen; and, according to Mulder, it belongs to the combinations of protein. Robin and Verdeil consider it to be albuminose. The term globulin is likewise given by M. Donne to small granulations appertaining to the chyle, which are observable in the blood with the microscope. They are small, white, roundish, isolated or irregularly-agglomerated grains; of about the 1-300 of a millimetre in diameter, and are regarded by M. Donne as the first elements of the blood globules. They are the white granulated corpuscles of Mandl.

A proteid from the lens ; any proteid of the group of which it is the type.