Protein Polymer Technologies Inc

Protein Polymer Technologies Inc. said Ethicon Inc., a unit of Johnson & Johnson, agreed to invest an additional $300,000 in the development-stage company, for a total $1.7-million investment. San Diego-based Protein Polymer is developing tissue adhesives and wound sealants used in surgery. The companies also extended their research joint venture through 1997.

Protein Polymer Technologies Inc. said Ethicon Inc., a unit of Johnson & Johnson, agreed to invest an additional $300,000 in the development-stage company, for a total $1.7-million investment. San Diego-based Protein Polymer is developing tissue adhesives and wound sealants used in surgery. The companies also extended their research joint venture through 1997.