When 11-day mice are fed with homologous or heterologous antibodies or with heterologous y-globulin, the maximum concentration of these proteins in their sera is reached 2 h later, irrespective of the amount or specificity of the proteins administered, or of the final con­ centration achieved. The relation between y (= relative titre of antibody, or concentration of heterologous y-globulin, att...

T HE discovery of so-called ‘ ‘incomplete’ ‘ or ‘ ‘blocking’ ‘ antibodies and of thermostable agglutinins reacting in serum or albumin but not in saline has stimulated discussion and speculation on their relation to each other and to the previously known Rh agglutinins which react in saline solution, and more recently on their relation to the various forms of fetal erythroblastosis. The problem...

Owing to unavoidable circumstances only a limited amount of time was available for the work on agglutination. The foregoing report is therefore preliminary only and the following conclusions are provisionally offered: I. Pneumococci by reason of their agglutinating properties exhibit a tendency to separate into numerous groups similar to streptococci. II. Pneumococcus mucosus forms a distinct a...

A previous study (15) has shown tha t transplantable mouse tumors differ in their capacity to grow progressively in rats pretreated with lyophilized mouse tumor tissue. An inverse correlation was found between the degree of strain specificity of tumors in mice and their transplantability to Pretreated rats. The present study deals with the correlation found between the transplantability of mous...

A previous study (15) has shown tha t transplantable mouse tumors differ in their capacity to grow progressively in rats pretreated with lyophilized mouse tumor tissue. An inverse correlation was found between the degree of strain specificity of tumors in mice and their transplantability to Pretreated rats. The present study deals with the correlation found between the transplantability of mous...

The effect of light on the sexual competence of a light-sensitive mating type minus strain (mt(-)) of Chlamydomonas eugametos obtained by crossing a light-sensitive mating type plus strain (mt(+)) with a light-insensitive mt(-) strain is described. As previously demonstrated for the mt(+) parent, this study of one of the mt(-) offspring shows that (a) a light-sensitive mechanism affects flagell...

A previous study (15) has shown tha t transplantable mouse tumors differ in their capacity to grow progressively in rats pretreated with lyophilized mouse tumor tissue. An inverse correlation was found between the degree of strain specificity of tumors in mice and their transplantability to Pretreated rats. The present study deals with the correlation found between the transplantability of mous...

A “cold” platelet agglutinin is described reacts only at temperatures below 34#{176}C. which is present in plasma and serum, It agglutinates homologous and autois greater than 100,000 in molecular logous platelets but appears to have no weight, appears to be a protein of the imeffect on in vivo platelet function. It is munoglobulin type, is adsorbed by plateseen in patients with systemic diseas...